HARKEN 57 mm HL Standup Block

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.

Specifications:

- Sheave Ø (mm):

57 mm - Sheave Ø (in):

2 1/4 in - 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 inB (mm)56 mm - B (in):

2 3/16 in - C (mm):

32 mm - C (in):

1 1/4 in - Includes:

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