Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action.

Sideplates and sheaves Hard Lube-anodized for maximum UV protection and a smooth surface. Center cage keeps Torlon® roller bearings separated and parallel to reduce friction.

Sheave Ø (mm)
57 mm

Length (mm)
114 mm

Length (in)
4 1/2 in

Weight (g)
200 g

Weight (oz)
7.04 oz

Maximum line Ø (mm)
12 mm

Maximum line Ø (in)
7/16 in

Maximum working load (kg)
1134 kg

Maximum working load (lb)
2500 lb

Breaking load (kg)
2268 kg

Breaking load (lb)
5000 lb

Fasteners (mm)
6 mm

Fasteners (in)
1/4 in

Fastener circle (mm)
37 mm

Fastener circle (in)
1 15/32 in

A (mm)
57 mm

A (in)
2 7/32 in

B (mm)
56 mm

B (in)
2 3/16 in

C (mm)
32 mm

C (in)
1 1/4 in