The Harken 1.5T Alum Loop V Block is a revolutionary addition to the Grand-Prix racing series. With a single set of V-shaped titanium rollers, Harken engineers have streamlined the mechanics of this block, resulting in unrivaled efficiency at high loads and smooth movement in light air. Designed for easy maintenance and inspection, this block features aluminum sideplates, a titanium sheave, and captive titanium roller bearings. At 47mm (1 7/8 inches), the sheave is ideal for lines up to 9mm (11/32 inches) in diameter and has a maximum working load of 1500kg (3300lb).