Optiparts Halyard with hook-in blocks - Halyard system as used on Blackgold masts. 3 mm ultra low stretch Vectran with spliced loops. Complete with the new HARKEN hook-in block and 29 mm tie-lite block. The whole system only weighs 28 grams. The combination of low system weight, low friction Harken blocks and spliced Vectran rope creates the most advanced halyard system available on the market