Swivel single ball block with shackle. Particularly smooth and light, generally used on monotipes and fins for vangs, trolleys adjustments, barbers, etc. The cheeks, the pulley and the balls are in delrin®, the metal parts in AISI 316.

Single block features:
Pulley diameter: 28 mm.
Maximum sheet diameter: 8 mm.
Overall height: 51 mm.
Weight: 24 gr.
Breaking load: 600 kg.
Working load: 150 kg.
Holes measures D.5 mm, center distance 55 mm.