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Harken 16 mm Double Block with Becket
The 16 mm is Harken’s® smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race. Sheave Ø (mm)16 mm Maximum line Ø (mm)5 mm Maximum working load (kg)204 kg
£32.65 £21.95
Harken 29mm Double Bullet Block with Becket
Low-friction Bullet blocks lead control lines aft. They are compact and lightweight, with fast trim and release under high or low loads. A range of styles lets these blocks adapt to almost all control line applications. Sheave Ø (mm)29 mm Length (mm)89 mm Weight (g)78 g Shackle pin Ø (mm)5 mm Maximum line Ø (mm)8 mm Maximum working load (kg)181 kg Breaking load (kg)907 kg
£44.59 £34.99

Harken 40 mm Double Block with Swivel and Becket
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Sheave Ø (mm)40 mm Maximum line Ø (mm)10 mm Maximum working load (kg)440 kg
£79.05 £54.95
Harken 57 mm Block with Swivel and Becket
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Sheave Ø (mm)57 mm Maximum line Ø (mm)10 mm Maximum working load (kg)359 kg
£55.49 £39.95