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Allen Brothers

Allen 20mm Triple Dynamic Block - A2024

Allen 20mm Triple Dynamic Block - A2024

20mm Triple Dynamic Block – Our Dynamic range is generally the best choice for applications that require constant sheave movement. The triple block is generally used in systems such as cunninghams or vangs, to give a larger purchase system.


Bearings – Dynamic Blocks feature our patented bearing system which uses twin rows of stainless-steel ball bearings running on a stainless-steel rail. This provides a superior load-carrying ability and longevity when compared to other bearing systems which run on a plastic rail.


Ultra-Strap – Our patented Ultra-Strap is used in our 20, 30 & 40mm Dynamic blocks. The Ultra-Strap is unique when compared to other designs because of its coining process. This process strengthens the strap, making it more reliable and hard-wearing as well as making it much more rope friendly than other designs. The Ultra-Strap was the first marine industry block designed to work specifically with a rope attachment.


Becket – Our 20 & 30mm blocks offer a large central rivet which not only reduces the overall weight but also offers a rope friendly attachment, perfect as a tie-off point when being used in a cascade system.

Line Dia: 2.5mm - 6mm

Break Load: 650Kg

Maximum Dynamic Load: 300Kg

Weight: 47.9g