These small and light blocks are the best solution for very high loads when sliding is not
important.
The very small sheave is fitted with a Composite Fibre bushing.
The one piece frame is made for line connection.
The 3 blocks (D=30, 40 and 55 mm) give an 8 to 1 system.
This system is specially designed for the backstay or the boom-vang.
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