Harken 2699 40mm Carbo Air Twing Block with Opening Side Plate

The Harken 2699 is a 40mm Carbo Air twing block designed for dinghies, sport boats, and small keelboats. This low-friction block combines lightweight construction with exceptional strength, delivering a maximum working load of 606 pounds and a breaking load of 1,818 pounds while weighing just 3 ounces.

Key Features:

• Opening side plate design allows easy rigging and removal from sheets with one-handed operation
• Spring-biased mechanism automatically opens when unlatched for quick line changes
• Roller at pivot base enables versatile 1:1 or 2:1 up-down control configurations
• Carbo Air® composite construction provides high strength-to-weight ratio for maximum float in light air conditions
• Accommodates lines up to 3/8 inch (12mm) diameter with smooth, low-friction operation

Common Applications:

• Spinnaker sheet and guy control systems
• Code zero sheet up-down control
• Tweaker and twing lines for sail trim optimization
• General trimming applications on small to mid-sized sailing vessels

Specifications:

• Sheave diameter: 40mm (1-9/16 inches)
• Overall length: 89mm (3-1/2 inches)
• Maximum line diameter: 12mm (3/8 inch)
• Maximum working load: 275kg (606 lbs)
• Breaking load: 825kg (1,818 lbs)