Harken 57 mm Carbo AirBlock

57mm Carbo Air Block - Double with Swivel and Becket

Features:

• Lightweight, strong and affordable
• Safe and easy trimming
• Blocks are 30% lighter with a 60% higher working load than Classic blocks
• Open AirBlock design eliminates unnecessary material and weight
• Ball bearings, sheave, and sideplates are UV stabilized with carbon black for maximum protection
• Patented switch locks shackle in front or side positions, or lets block swivel to keep line from twisting
• Designed for use with:
  • Main/jib sheets
  • Mainsheet fine-tune
  • Control lines
  • Vangs
  • Cunninghams
  • Outhauls

Specifications:

• Safe working load: 1584 lb (720 kg)
• Breaking load: 3300 lb (1500 kg)
• Weight: 6.6oz (187g)
• Sheave diameter: 2-1/4" (57 mm)
• Maximum line size: 7/16" (10 mm)