Double block with swivel

Double Tufnol Block - with Swivel

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Tufnol is a traditional laminated plastic material made from phenolic resin and woven cotton or linen fabric.  It is strong and light, and provides an economical, low maintenance and traditional solution for sailing boat blocks.

Our Tufnol blocks are manufactured in Holland with solid stainless steel frames and brass bush bearings.

The double Tufnol block, fitted with a swivel, comes in four sizes to work with ropes from 10mm through to 16mm.


SKU Shell Size  Rope Size* Sheave
Breaking Load 
Safe Working
021634  2-1/4" (58mm)  10mm  30mm  Approx. 630kg  315kg
021635  2-3/4"" (70mm)  12mm  35mm  Approx 960kg  480kg
021636  3-3/4" (95mm)  14mm  50mm  Approx 1740kg  870kg
021637  4-3/4" (120mm)  16mm  63mm  Approx 2030kg  1015kg

* Note - we recommend choosing products one rope size size larger than indicated to ensure adequate free movement.