Low-profile mastbase halyard lead blocks are lightweight and can be grouped in a small area at the mastbase.

Sheave Ø (mm)
102 mm

Sheave Ø (in)
4 in

Length (mm)
130 mm

Length (in)
5 1/8 in

Width (mm)
41 mm

Width (in)
1 5/8 in

Height (mm)
130 mm

Height (in)
5 1/8 in

Weight (g)
708 g

Weight (oz)
24.9 oz

Maximum line Ø (mm)
18 mm

Maximum line Ø (in)
11/16 in

Fasteners (mm)
16 HH mm

Fasteners (in)
5/8 HH in

Maximum working load (kg)
4990 kg

Maximum working load (lb)
11000 lb

Breaking load (lb)
22000 lb