45 mm Wire Block - For 5mm backstay and 4 mm soft wire, Composite Sheave45 mm plain bearing for high load applications such as backstay. Stainless cheeks and composite sheave with polymer plain bearing. Features a 8 mm pin and a bushing for 10 mm application. This block is optimised for soft wires (7x19 strand) or Dyneema Spectra core. SubType: HLPBB Size: 45 SWL: 1100 kg W1: 9. 50 Pin1: 8. 00 Pin2: 10. 00 Breaking Load (kN): 2200 kg MaxBackstayW: 5 mm MaxSheaveW: 4 mm