Choose Harken Black Magic for the Ultimate in block performance. The Centre cage keeps Torlon roller bearings separated and parallel to reduce friction. Dirt and salt falls between rollers whilst the captive delrin balls carry sideloads.

Side plates are milled from 6061-t6 Aluminium and using CNC sculpting to remove excess weight. Thin Profile, deep groove aluminium sheaves have radiused edges to protect high tech line.

Sheaves and sideplates are deep-saturation hardkote-anodized for strength and durability in addition to being UV stabilised with black additive for maximum protection. Finally the blocsks are teflon impregnated for a smooth slippery surface.