Superthermal™ Hydrobase® provides amazing moisture wicking properties that carry sweat away from the body fast to keep you dry

Double swivel 850 kg SWL suits 6 - 8mm chain

Strong and durable fabrication with the heaviest-duty components

For boats less than 15 m (50')

A favourite with ocean crews

Ronstan Series 29 Utility Block, Double Loop Top RF81 SAIL BOAT HARDWARE Superthermal™ Hydrobase® provides amazing moistureDouble, loop head FEATURES Lightweight durable construction. Economical. Maintenance free Specifications Product Specifications Type of Block Double Sheave diameter (mm) 30mm B. L. (kg) 600 M. W. L. (kg) 300 Max. Rope diameter (mm) 8 Weight (g) 40