Tulip sheave, sheave 90, SWL 5000 kg. The Tulip sheaves are fixed sheaves that do not turn in the direction of manoeuvres since they accept quite different lead angles. The choice of a Tulip sheave instead of a revolving block comes from the need to reduce bulk and weight. The sheave, with an axial bearing in composite fibre and large round bearings (self-captive) in Torlon for side loads, is in anodized and Teflon coated aluminium and can handle very high loads.