Product Description Harken 150mm Aluminum FootblockThe entire line of Black Magic® AirBlocks® has been redesigned with a sleek new look. Their unique, performance-packed engineering remains exactly the same.Carrying some of the highest loads imposed by running rigging, these strong, lightweight blocks feature Torlon® roller bearings housed in a center cage. Rollers stay parallel for low-friction efficiency. Sculpted hardcoat-anodized aluminum sideplates protect sideload ball bearings. Dissimilar metals are isolated to minimize corrosion. Blocks are easily disassembled with a single hex wrench.Either metric or imperial flathead fasteners may be used for mounting and are not exposed. Specifications: Sheave Ø (mm) 150 mm Sheave Ø (in) 5 15/16 in Length (mm) 205 mm Length (in) 8 1/16 in Weight (g) 1661 g Weight (oz) 58.58 oz Maximum line Ø (mm) 25 mm Maximum line Ø (in) 1 in Fasteners (mm) 16 FH mm Fasteners (in) 5/8 FH in Maximum working load (kg) 6804 kg Maximum working load (lb) 15000 lb Breaking load (kg) 13608 kg Breaking load (lb) 30000 lb Height (mm) 48 mm Height (in) 1 7/8 in Number of fasteners 4 A (mm) 20.5 mm A (in) 13/16 in B (mm) 53.5 mm B (in) 2 3/32 in C (mm) 129 mm C (in) 5 3/32 in D (mm) 41 mm D (in) 1 5/8 in E (mm) 154 mm E (in) 6 1/16 in F (mm) 204 mm F (in) 8 1/32 in G (mm) 33 mm G (in) 1 5/16 in