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)
85 mm

Length (in)
3 3/8 in

Weight (g)
54 g

Weight (oz)
1.9 oz

Shackle pin Ø (mm)
5 mm

Shackle pin Ø (in)
3/16 in

Maximum line Ø (mm)
8 mm

Maximum line Ø (in)
5/16 in

Maximum working load (kg)
299 kg

Maximum working load (lb)
660 lb

Breaking load (kg)
737 kg

Breaking load (lb)
1625 lb