Harken Black Magic Aluminum Low-Load Block - 75 mm (2 15/16") - 3243

Harken Black Magic Air aluminum low-load block is designed for high-performance racing and cruising sail control applications that require lightweight low-friction operation. Delrin® ball bearings, stainless steel hardware, and a swivel shackle design support smooth trimming and reliable performance under load.

Features:

• Designed for mainsheet, runner, halyard, and spinnaker control systems
• Center cage keeps Torlon® roller bearings separated and parallel to reduce friction
• Swivel shackle design locks in two directions or rotates freely to help reduce line twist
• Low-load configuration features a red isolator
• Delrin® ball bearings support smooth low-friction performance
• 17-4 PH stainless steel headpost and 316 stainless steel shackles provide strength and corrosion resistance
• Lightweight aluminum construction supports high-performance sail handling

Specifications:

• Sheave Diameter: 75 mm (2 15/16")
• Length: 129 mm (5 1/8")
• Shackle Pin Diameter: 8 mm (5/16")
• Maximum Line Diameter: 14 mm (9/16")
• Maximum Working Load: 1361 kg (3000 lbs)
• Breaking Load: 2722 kg (6000 lbs)
• Weight: 335 g (11.82 oz)