Tempest Metal Ballraced 15mm Rigging Block
0.5 mm stainless steel sides and 15 mm diameter.
2 mm thick nickel-plated brass sheaves, 14 mm diameter with 8 stainless steel balls for the bearing. 3 mm diameter roller. The ball bearing ensures fast rotation for optimized manoeuvres.
Average weight of a single block: 3.3 g.