Harken 2652 40mm Carbo Air Stand-up Block Fixed Single

The Harken 2652 40mm Carbo Air® Stand-up Block (Fixed) is a high-performance, low-friction sailing block engineered for smooth, reliable sail trimming on sportboats, dinghies, and small keelboats. Part of Harken's award-winning Carbo Air® line, this compact fixed stand-up block delivers an exceptional strength-to-weight ratio, making it a trusted choice for performance-oriented sailors.

Key Features:

• 30% lighter than equivalent Classic blocks while offering 60% higher working load
• Open Air Block design eliminates unnecessary material to minimize weight without sacrificing strength
• Fiber-reinforced composite construction with glass-filled nylon sideplates densely packed with long-glass fibers for maximum durability
• High-load ball bearings with fitted curved races for smooth, low-friction sheave rotation
• Ball bearings, sheave, and sideplates are UV-stabilized with carbon black for long-term protection against sun and saltwater
• Fixed stand-up orientation with integral spring — allows block to tilt and adjust to line angle
• Eyestrap mount for straightforward deck installation

Specifications:

• Sheave Diameter: 40mm (1-9/16")
• Block Length: 70mm (2-3/4")
• Weight: 1.7 oz (48g)
• Maximum Line Diameter: 10mm (3/8")
• Maximum Working Load: 220 kg (485 lb)
• Breaking Load: 735 kg (1,620 lb)

Ideal for jib and mainsheet systems on high-performance dinghies and loaded control lines on small keelboats, the Harken 2652 is a compact, go-anywhere block that pairs seamlessly with the Harken Black Magic® block line. Recognized with both the Dame Award and Sail Magazine's Freeman-Pittman Award for innovation.