100 mm Wire Block - For 10mm backstay and 8 mm soft wire100 mm Plain Bearing Block for high load applications such as a backstay. Ideal as the top block in a cascade system. Electropolished stainless cheeks and black anodized aluminium sheave with polymer plain bearing. This block is optimised for 8 mm soft wires (7x19 strand) or Dyneema Spectra core. SubType: single Size: 100 SWL: 4000 kg W1: 15. 50 W2: 12. 50 Pin1: 16. 00 Breaking Load (kN): 8000 kg MaxBackstayW: 10 mm MaxSheaveW: 8 mm