The Harken Zircon Triple Block, Part No. 2199, has a maximum working load of 990 lb (450 kg) and can accommodate a maximum line diameter of 10 mm. The block features industrial ceramic ball bearings mounted in caged races, ensuring maximum efficiency and performance. Available in 40 and 57 mm sizes with single or double sheaves, it also comes with an optional becket attachment. The sheave diameter is 2 1/4 inches (57 mm), perfect for small boat operations.