Overview
Set up dinghy control lines with the Ronstan Series 20 triple ball bearing block with becket and 2-axis shackle head. It provides low-friction line handling for vangs, Cunninghams and traveller controls, with a head that can be fixed in either of two orientations.
Key features
- Ball bearing sheaves reduce friction as control lines move through the block.
- A head that fixes at 0° or 90° gives you two alignment options.
- Lightweight construction keeps the block's weight to 64g.
- UV-stabilized sheaves and impact- and UV-resistant cheeks suit exposure on deck.
Specifications
- Configuration: Triple block with becket and 2-axis shackle head
- Sheave diameter: 20mm (3/4")
- Maximum rope diameter: 6mm (1/4")
- Pin diameter: 4mm (5/32")
- Maximum working load: 400kg (880lbs)
- Breaking load: 850kg (1,870lbs)
- Weight: 64g (2.3oz)
- Ball bearings: Stainless steel
- Sheave material: UV-stabilized Acetal
- Load strap and head fitting: Grade 316 stainless steel
- Cheek material: Impact- and UV-resistant, fiber-reinforced Nylon
Specifications
| Brand | Ronstan |
|---|---|
| Manufacturer part # | RF20312 |
| UPC | 9316800255580 |
| Boxed dimensions | 3 x 2 x 1 in |
| Shipping weight | 0.1 lb |
| Country of origin | INDONESIA |
Shipping & returns
Free standard shipping
Standard shipping is free on every U.S. order — no minimum. Need it faster? Faster delivery options are available at checkout for qualifying orders. In-stock orders ship quickly with tracking; oversized and freight items may ship separately and can take a little longer. International rates are calculated at checkout.
30-day returns
Request a return within 30 days of delivery. Authorized returns are subject to a 15% restocking fee. Return shipping is paid by the buyer; items must be new and in original packaging. See our refund policy.
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We source from authorized U.S. distributors. Every product is new, genuine and covered by the manufacturer warranty.
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