Harken Micro Cam Base — Swivel, 16 mm SheavesPart No. 462 Ball bearing swivel bases feature dual rows of Delrin ball bearings that swivel freely even under high loads. Bases include stand up springs and a U adaptor to accept a variety of appropriate blocks. Delrin is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates. Maximum line (mm) 6 mm Maximum line (in) 1 4 in Maximum working load (kg) 91 kg Maximum working load (lb) 200 lb Minimum line (mm) 3 mm Minimum line