SKU: 43705883423

30" Trailer Leaf Spring - Slipper Flat End - 2 Leaves - 4321-10

Sale price$48.51 Regular price$53.90
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Ships within 48 hours · Estimated delivery Aug 19 - Aug 24

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Description

30" Trailer Leaf Spring - Slipper Flat End - 2 Leaves - 4321-10Number of Leaves 2 Leaf Spring Width: 1 3 4" A Leaf Spring Length: 15" B Leaf Spring Length: 17 3 4" C Spring Arch: 4. 88" D Stack Height: . 72" E Eye to End Length: 30" Bushing Inside Diameter: 9 16" Leaf Spring Material: . 360 Leaf Spring Capacity: 1,000 lbs. Slipper End Type Flat End Alternate SKU: UNA 038, US 3005, US3005, UFB30002, WD 2, WD2, 432110, LF30002L, UNA038 Slipper Leaf Spring 4321 10 fits all types of trailers including utility, boat,

  • Number of Leaves - 2
  • Leaf Spring Width: 1-3/4"
  • A - Leaf Spring Length: 15"
  • B - Leaf Spring Length: 17-3/4"
  • C - Spring Arch: 4.88"
  • D - Stack Height: .72"
  • E - Eye to End Length: 30"
  • Bushing Inside Diameter: 9/16"
  • Leaf Spring Material: .360
  • Leaf Spring Capacity: 1,000 lbs.
  • Slipper End Type - Flat End
  • Alternate SKU: UNA-038, US-3005, US3005, UFB30002, WD-2, WD2, 432110, LF30002L, UNA038


Slipper Leaf Spring 4321-10 fits all types of trailers including utility, boat, travel, dump and horse trailers. Same as part number UNA-038 and W-2. This 4321-10 trailer slipper spring has a 9/16" ID nylon bushing installed on one end and a flat end slipper end on the other. Measure along the surface of the leaf spring for the most accurate measurement. Eye to end measurements can vary over time due to the slipper spring flattening out. Contact the experts at Spring Works if you have any questions.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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  • Delivery to the USA:
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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: 43705883423

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4.7 ★★★★★
Based on 24 reviews
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Edith
Port Orchard, US
★★★★★ 3
Incredibly hydrating but unbearable scent.
Size: 1.3 Ounce (Pack of 1)
I love all Avène skin barrier creams, recovery lotions and i just purchased this "Hydrance" cream. Texture is nice, it's unbelievably hydrating but the scent is overwhelming. It caused me a headache. So I decided to return it. Then I thought I'll give it another try and Oh my.... For the love of God, remove that awful scent. The reason I love Avène product is because theyre unscented, except this one I guess :/
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Reviewed in the United States on January 9, 2026
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Verified Purchase
Ira S
San Leandro, US
★★★★★ 5
Good product
Size: Large, Color: Black
A little pricey but works very well. Wheels roll smoothly and umbrella stays put.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
A
Verified Purchase
Angela
Belleville, US
★★★★★ 5
wheels are perfect
Size: Large, Color: Black
Really happy with this umbrella base so far. It feels sturdy and well-made, especially once filled—it definitely has the weight to keep my umbrella in place, even on windy days. The wheels are a huge plus. I can move it around the patio without struggling, which makes adjusting for shade super easy. The square design also looks clean and doesn’t take up too much space. Setup was simple, and it fits my umbrella perfectly. Overall, it does exactly what I needed—strong, stable, and easy to move. Great buy.
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Reviewed in the United States on March 24, 2026
A
Verified Purchase
Amazon Customer
Carnegie, US
★★★★★ 4
Easy rolling base
Size: Large, Color: Black
I purchased the umbrella base to enabling the ability to hold our umbrella and easy maneuver the umbrella on a paver patio. The base supported the umbrella and rolled sufficiently on the paver surface. However I did have an issue when readying the base for storage that the plastic umbrella pole support caused a black staining liquid on the pavers when it spilled on the patio
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Reviewed in the United States on June 10, 2025
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Verified Purchase
M.E.
Pawtucket, US
★★★★★ 5
Good Value
Size: Extra Large, Color: Black
Very easy to assemble, good instructions, seems to be decent quality.
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Reviewed in the United States on April 9, 2026

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