SKU: 21933140276

Brush Research Manufacturing GBD31412 FLEX-HONE Cylinder Hone. GBD Series. Silicon Carbide Abrasive. 3-1/4" (83 mm) Diameter. 120 Grit Size

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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18

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Description

Brush Research Manufacturing GBD31412 FLEX-HONE Cylinder Hone. GBD Series. Silicon Carbide Abrasive. 3-1/4" (83 mm) Diameter. 120 Grit SizeFlexible honing with the Flex Hone tool produces an oil holding cross hatch pattern and a true plateau finish free of cut. torn and folded metal. Any type or size of cylinder can benefit from the Flex Hone. These abrasive bead style brushes are produced in standard diameters from 4mm to 36 inches. Nine abrasive types are offered including silicon carbide. aluminum oxide. boron carbide and diamond allowing the tool to be tailored to finish any base

Flexible honing with the Flex-Hone tool produces an oil holding cross hatch pattern and a true plateau finish free of cut. torn and folded metal. Any type or size of cylinder can benefit from the Flex-Hone. These abrasive bead style brushes are produced in standard diameters from 4mm to 36 inches. Nine abrasive types are offered including silicon carbide. aluminum oxide. boron carbide and diamond allowing the tool to be tailored to finish any base material. A choice of 11 different grit selections are available for precise control of finish parameters. The elimination of peaks results in rapid ring seating. better oil control. reduced seepage in hydraulic and pneumatic applications and provides better seal performance and longer seal life. Successful applications include firearm chambers. shotgun barrels. musical instruments. combustion chambers. air compressors. pumps. valve bodies. valve guides. brake cylinders. wheel cylinders and the list goes on and on. Flex-Hone tools are also very effective for deburring cross drilled holes. port radiusing and edge blending. Because of its unique construction. the Flex-Hone is self-centering. self-aligning. and self-compensating for wear so it does not require an elaborate set-up or special training. Deburring can be effectively automated and combined in the machining process to allow a complete cylinder finish in one operation or it can be employed as a secondary operation with equal results.

Features

  • Flexible abrasive cylinder hone for surface finishing and cross hole deburring

  • Self-centering. self-aligning. self-compensating for wear

  • Use by hand or in CNC equipment

Specifications

Brand Name: Flex-Hone Tool

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: 21933140276

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4.5 ★★★★★
Based on 24 reviews
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Product Reviews
J
Verified Purchase
J Chase
Dallas, US
★★★★★ 5
It is an air filter
Fit perfect easy replacement and saves $$$.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
K
Verified Purchase
katsura
Belleville, US
★★★★★ 5
Perfect fit for 2020 Subaru Outback
Fit my 2020 Subaru Outback perfectly. 5-minute install. Works great. My previous cabin filter was scary to see.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 16, 2025
R
Verified Purchase
Richard Gopen
Pawtucket, US
★★★★★ 5
Good, inexpensive replacement filter
I've used these filters for a couple years (four replacements) on my Subaru Crosstrek, and they seem to do the job well, probably as well as the original. I generally remove and clean them every three months, and replace them every six.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026
J
Verified Purchase
Jim Wallace
Carnegie, US
★★★★★ 5
Save some money by doing your own cabin filter change! (You won't notice a difference).
So, one day I was getting an oil change at the dealership, and the associate told me that cabin filter was pretty dirty, which I believed because of the places I take the car, and she said that they could change it while they were finishing up the rest of their inspection, since they already had it apart. I asked her "How much?", and then we both had a laugh when she said "$90." I told her I'd take care of it. It took two days for Amazon to get a replacement filter to me, twenty minutes to watch a You Tube video showing how to replace the cabin filter on my car (I watched it twice), and then about twenty-five minutes to replace the filter itself--I keep a messy glove compartment, so a good portion of the time was loading and unloading that nightmare. In the end, under $15 for the filter, maybe 45 minutes to watch and replace, and the cabin filter hasn't been this good since I first bought the car. This replacement version was as good as the OE filter, fit exactly the same, there's no difference in airflow that I can tell, and so far (6 months later), it seems to be holding up pretty well. We'll see what it is like after a year. I did get the oil changed about a week ago, and the technician didn't raise any alarms about the filter, so everything seems to be working. $90 for a new filter? You can do it yourself cheaper.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 6, 2026
C
Verified Purchase
chad martin
Natrona Heights, US
★★★★★ 4
Fresh Air Upgrade for My 2024 Impreza
Installed this in my 2024 Subaru Impreza, and it fit perfectly—no issues. The air smells noticeably cleaner now, and it took less than 10 minutes to swap out. The carbon and HEPA filtration does a great job clearing out odors, dust, and pollen—definitely an upgrade over the factory filter. The build feels sturdier than the OEM version, though it does have slightly fewer pleats. Might mean it needs replacing a bit sooner, but for the price and performance, I’m fine with that tradeoff. If you’re looking for a quick, affordable way to improve your cabin air, this one’s a solid pick. 
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Reviewed in the United States on June 26, 2025

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