Harken Black Magic Runner Block - 45 mm ( 1 3/4") - 3396

Harken Black Magic Runner Blocks are designed for running backstay systems on offshore boats, helping adjust mast bend for changing wind conditions. Integrated sideplate bails and recessed cotter keys create a smooth low-profile design that helps prevent snagging on lifelines and rigging.

Features:

• Runner block design supports offshore running backstay control systems
• Integrated sideplate bails help reduce snagging on lifelines and rigging
• Recessed cotter key supports smooth low-profile operation
• Torlon® roller bearings help minimize friction under load
• Hard Lube-anodized sideplates and sheaves provide UV and corrosion resistance

Specifications:

• Sheave Diameter: 45 mm (1 3/4")
• Length: 71 mm (2 13/16")
• Maximum Line Diameter: 10 mm (3/8")
• Maximum Working Load: 750 kg (1653 lbs)
• Breaking Load: 1500 kg (3306 lbs)
• Weight: 82 g (2.89 oz)