The Harken 29mm Bullet Sheave Part No. 160 is the perfect choice for sailors seeking to personalize their equipment. With Delrin¨ material and ball bearings, specifically designed for use with rope, this sheave is a top-of-the-line option. Delrin¨ is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates. The self-contained sheave is 29 mm in diameter, with a width of 1/2 in and a maximum line diameter of 5/16 in. It can handle a maximum working load of 300 lb or 136 kg. At only $15.85, this sheave is a great investment for any sailing enthusiast.