Harken 2644 40mm Carbo Air Cheek Block - Low-Friction Sailing Block

The Harken 2644 40mm Carbo Air® Cheek Block is a lightweight, high-strength, low-friction sailing block engineered for reliable performance and affordability. Designed as part of Harken's Carbo Air Block series, this cheek block delivers the performance sailors expect in a compact, weight-optimized package suited for a wide range of sail trimming applications.

The Open Air Block design strips away unnecessary material to reduce weight without sacrificing strength. At just 1.2 oz (34 g), this block offers a 485 lb (220 kg) maximum working load and a 1,620 lb (735 kg) breaking load, making it an outstanding strength-to-weight performer. It accepts lines up to 3/8 in (10 mm) in diameter and features a 1-9/16 in (40 mm) sheave diameter.

Key Features:

• Open Air Block design eliminates excess material for maximum weight savings
• Ball bearings, sheave, and side plates are UV-stabilized with carbon black for long-term durability
• Patented switch lock positions shackle in front or side orientation, or allows the block to swivel freely to prevent line twist
• 30% lighter and rated for 60% higher working loads than classic Harken blocks
• Compatible with lines up to 3/8 in (10 mm) diameter
• Maximum working load: 485 lb (220 kg)
• Breaking load: 1,620 lb (735 kg)
• Overall length: 2-3/4 in (70 mm)
• Weight: 1.2 oz (34 g)

The Harken 2644 Carbo Air® Cheek Block is the ideal choice for sailors seeking a high-performance, lightweight block for safe and effortless sail trimming on racing or cruising sailboats.