SKU: 81528031958

MDF Radius Corners, Econo Qtr Rnd (accepts 5/8" plywood), 3" Radius 4 1/4"W x 1 5/16"D x 97"L, Contact us for more information BEFORE PURCHASING

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Description

MDF Radius Corners, Econo Qtr Rnd (accepts 5/8" plywood), 3" Radius 4 1/4"W x 1 5/16"D x 97"L, Contact us for more information BEFORE PURCHASINGWhite River Hardwoods MDF Radius Corners Made in the USA 3 Econo Quarter Round SKU 3ECQ58 Accepts 5 8 Plywood 3 Radius 97 Length Double Refined MDF 4 1 4W 1 5 16D Ships LTL A tighter 3 radius in the Econo Quarter Round profile for cabinetry and furniture where the 4 radius is too wide for the design. Accepts 5 8 plywood. Contact us before purchasing to confirm availability and lead time. Made in Fayetteville, AR The Only National MDF Radius Corner

White River Hardwoods · MDF Radius Corners · Made in the USA

3″ Econo Quarter Round

SKU 3ECQ58 · Accepts 5/8″ Plywood · 3″ Radius · 97″ Length

Double Refined MDF · 4 1/4″W × 1 5/16″D · Ships LTL


A tighter 3″ radius in the Econo Quarter Round profile — for cabinetry and furniture where the 4″ radius is too wide for the design. Accepts 5/8″ plywood. Contact us before purchasing to confirm availability and lead time.

Made in Fayetteville, AR · The Only National MDF Radius Corner Manufacturer in the USA

⚠ Contact Us Before Purchasing — Call 1-800-558-0119 to confirm availability & lead time

The 3″ Econo Quarter Round — a tighter radius for tighter spaces, in Double Refined MDF made in the USA.

Product Details

Dimensions & Specifications

SKU Profile Radius Accepts Width Depth Length
3ECQ58 Econo Quarter Round 3″ Radius 5/8″ plywood 4 1/4″ 1 5/16″ 97″

* Material: Double Refined MDF. Lead time: 7–10 business days. Ships LTL — minimum $45 freight. Street address required for delivery.

Why MDF Radius Corners

The Problem This Solves

⌒

Econo Quarter Round — 3″ Radius

The 3″ Econo Quarter Round profile delivers a tighter radius transition than the 4ECQ58 — ideal for narrower cabinet runs, tighter furniture profiles, or design specifications that call for a more compact corner radius.

▣

Double Refined MDF

Double Refined MDF machines cleanly, paints to a flawless finish, and holds its shape over time. No grain inconsistency, no void risk — just a consistent, dense substrate that takes primer and paint the way cabinetry demands. A surface indistinguishable from solid wood when properly primed and painted.

★

Only National Manufacturer

White River Hardwoods is the only national manufacturer of MDF radius corners in the USA — made in Fayetteville, AR. Consistent quality, reliable availability, and a supplier that has been delivering to the cabinetry industry nationally for decades.

⊞

Accepts 5/8″ Plywood

Engineered specifically for 5/8″ plywood box construction — the standard substrate for this profile. The plywood box butts cleanly into the radius corner without shimming, scribing, or custom fitting. One piece, right the first time.

Technical Specifications

Key Facts

Profile

Econo Quarter Round

Radius

3″

Accepts

5/8″ Plywood

Width

4 1/4″

Depth

1 5/16″

Length

97″

Material

Double Refined MDF

Lead Time

7–10 Business Days

Made In

Fayetteville, AR

Contact Us Before Purchasing

This SKU has limited availability. Please call 1-800-558-0119 or email [email protected] before placing your order to confirm current stock, lead time, and freight details. We want to make sure this product is the right fit for your project before you commit.

Installation

Working With Radius Corners

1

Plan Your Layout

Determine the location and orientation of each radius corner. The piece is 97″ long — cut to your finished height. Mark cut lines accurately before cutting; MDF does not forgive mis-cuts at visible faces.

2

Cut to Height

Cut with a fine-tooth carbide blade — MDF dulls blades quickly. Cut from the finish face to minimize tear-out. Support the full length when cutting to prevent binding and chipping at the cut line.

3

Dry Fit First

The 5/8″ plywood box should seat cleanly into the radius channel. Dry fit before applying any fasteners or adhesive — confirm seating depth and check that the radius face is flush with adjacent cabinet faces.

4

Fasten & Secure

Secure with construction adhesive and finish nails or screws through the cabinet box. Pre-drill to avoid splitting. Set fasteners slightly below the surface — MDF fills cleanly and holds fasteners well when properly pre-drilled.

5

Fill & Prime

Fill all nail holes and seams with lightweight filler. Sand flush when dry. Apply a quality MDF primer before finish coats — MDF is highly absorbent and requires a sealing primer coat for a smooth, paint-ready surface.

6

Finish to Match

Apply your chosen paint in thin, even coats over the primed surface. Two finish coats over primer is standard for a smooth painted cabinet finish. Sand lightly between coats with 220-grit.

Always Prime MDF Before Finishing

MDF is highly absorbent at cut edges and faces. A quality MDF-specific or high-build primer is essential before any finish coat. A properly primed MDF radius corner paints to a finish indistinguishable from solid wood — skipping the primer step results in an uneven surface that requires significant additional work to correct.

Shipping — LTL Freight

MDF Radius Corners ship via LTL freight. Freight is calculated by destination with a minimum charge of $45. If actual freight exceeds $45, a separate freight invoice will be emailed after your order is placed.

Important: LTL delivery requires a physical street address. We are unable to deliver to APO/FPO addresses or PO Boxes. Estimated lead time is 7–10 business days from order confirmation, subject to inventory availability.

3ECQ58 — 3″ Econo Quarter Round Radius Corner. Contact us before purchasing for availability confirmation.


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 81528031958

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dqh
Carnegie, US
★★★★★ 5
the BEST BOOK EVER to learn what autism feels like
Format: Hardcover
I have read just about every book ever written (in English) related to autism -- well over 700 of them. This is the best book that communicates what autism feels like, and our life experiences. I'm decades older than the audience the book is intended for; but EVERYONE should read this book to understand we who are different. It also points out several well-known facts: autism has some heredity trails, having just one trusted adult who treats the different child like they are valuable is key to that child being able to cope with the world around them. What surprised me was when an educator with over 25 years of experience in special ed, just did not think the book was that good. That convinced me of the book's unique value: it truly puts the reader in the body and mind of the different child. Some educators cannot do that. The story focuses upon a female -- so not sure how applicable it is to a male different child. I hope some others would test that out. The BEST BOOK EVER to understand what autism feels like. I know as I have been on the autism spectrum since before there was an autism spectrum.
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Reviewed in the United States on July 10, 2023
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Meredith A
Louisville, US
★★★★★ 5
Fantastic read
Format: Hardcover
Read as part of upper elementary book club with 4th and 5th graders. Told entirely in prose from the point of view of a 7th grade girl struggling with changing social dynamics and self-identity, we see Selah learn to advocate for herself amidst family and school challenges. This book made me laugh and cry, but more than anything, it made me cheer Selah on as she discovers what autism means for her.
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Reviewed in the United States on October 16, 2024
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stargazer
Draper, US
★★★★★ 5
Good Different
Format: Hardcover
A Great Book.
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Reviewed in the United States on November 3, 2025
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YZK
Birmingham, US
★★★★★ 5
Great Gift
Format: Hardcover
Great Fun Book with whole details. My son loved the book so much.
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Reviewed in the United States on December 27, 2025
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M.Tidwell
Alexandria, US
★★★★★ 5
Fun educational book
Format: Hardcover, Format: Hardcover
This book is a big hit! My 5 year old son and I read it so many times since we ordered this in April. It has cute illustration and 60 flaps and pop-ups which make the book even more exciting. And because of this, I don’t recommend this book to young kids under 3 though. Some flaps might be tricky for younger kids. Even I as a parent learned so much about construction.
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Reviewed in the United States on May 27, 2025

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