Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming.

Sheave Ø (mm)
29 mm

Sheave Ø (in)
1 1/8 in

Length (mm)
66 mm

Length (in)
2 5/8 in

Weight (g)
26 g

Weight (oz)
.9 oz

Shackle pin Ø (mm)
4 mm

Shackle pin Ø (in)
5/32 in

Maximum line Ø (mm)
8 mm

Maximum line Ø (in)
5/16 in

Maximum working load (kg)
150 kg

Maximum working load (lb)
330 lb

Breaking load (kg)
454 kg

Breaking load (lb)
1000 lb

Maximum working loads and breaking loads for blocks based on cam strengths.