Harken Black Magic blocks are lightweight, strong and feature free-rolling high-load Torlon® roller bearings for a high strength-to weight ratio.
Like all AirBlocks®, the three-way head swivels/locks in front/side positions. Blocks are easily disassembled with a single hex wrench.
Sheave Ø (mm)57 mm
Maximum line Ø (mm)12 mm
Maximum working load (kg)1134 kg