Double tufnol block with swivel & becket

Double Tufnol Block - Swivel with Becket

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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 the Netherlands with solid stainless steel frames and brass bush bearings.

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


Shell Size  Rope Size* Sheave
Breaking Load 
Safe Working
 2-1/4" (58mm)  10mm  30mm  Approx. 630kg  315kg
 2-3/4"" (70mm)  12mm  35mm  Approx 970kg  485kg
 3-3/4" (95mm)  14mm  50mm  Approx 1710kg  855kg
 4-3/4" (120mm)  16mm  63mm  Approx 2010kg  1005kg

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