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Ships within 48 hours · Estimated delivery Jun 30 - Jul 5
For Your Every Summer RSVP, with Code: SUMMER15
Description
Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171]Series 40 Ball Bearing Block Single Upright Lead Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. Precision molded Acetal sheaves running on Acetal or Torlon ball bearings provide high performance & low friction. The 2 stage ball bearing system provides consistent performance over the full load range. Applications: Typically used for halyards at the mast base. Materials: Acetal ball
![Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171] Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171]](https://cdn.shopify.com/s/files/1/0405/8454/4408/products/70615XL.jpg?v=1591347459)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.7 ★★★★★
Based on 1310 reviews
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Product Reviews
★★★★★ 5
Alternative to OEM fasteners.
Color: 40pcs
Good alternative to OEM part
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 7, 2025
★★★★★ 5
Quick and easy part to install
Color: 40pcs
My wife accidentally hit a parking curb and popped the bumper cover of her car. The flexing caused some of the clips to break. The bumper sprang back, but the clips just fell out. Basically, they sacrificed themselves. These new clips fit perfectly and the bumper is ready for action. Keep some in your glovebox, you'll be glad you did.
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Reviewed in the United States on March 4, 2025
★★★★★ 5
They work
Color: 40pcs
These fit my 16 honda accord splash shield. The dealer forgot to put my originals back on when they changed the granny fluid. BH I Edmond ok just does not care about quality work.
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Reviewed in the United States on August 5, 2025
★★★★★ 5
Used on 2018 honda accord sport.
Color: 40pcs
Needed some of these since i was changing some stuff under my front bumper. They look and function the same as oem. And there are plenty to use as well. Would definetley pick up some of these as your current one will probably break as your taking them out.
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Reviewed in the United States on June 18, 2025
★★★★★ 5
Perfect fit
Color: 20pcs
Perfect replacement retainer clips for my car.
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Reviewed in the United States on February 15, 2026
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