These blocks are optimised for wires or Dyneema/Spectra core lines. Stainless steel, electro polished cheeks. Size 60-130mm: anodised aluminium sheave and polymer plain bearing bushing. Size 45mm: composite sheave and polymer plain bearing bushing. Outer side plates to increase breaking load but still optimising the weight. The sheave is V-shaped for wires.Light holes to reduce weight. Two polyamide washers on pin/bushing to reduce play between wire terminal and cheeks. Designed for wire applications subject to rig loads e.g. backstays. Choose the size of block that suits your requirements

These high load ball bearing blocks have steel sides for strength. They are ideal for halyards, tackles, runners in a dynamic, low load situation. Stainless steel sides for high strength/stiffness. One row stainless steel ball bearings. Ball cage for reduced weight & friction.

These high load ball bearing blocks have steel sides for strength. They are ideal for halyards, tackles, runners in a dynamic, low load situation. Stainless steel sides for high strength/stiffness. One row stainless steel ball bearings. Ball cage for reduced weight & friction.

These high load ball bearing blocks have steel sides for strength. They are ideal for halyards, tackles, runners in a dynamic, low load situation. Stainless steel sides for high strength/stiffness. One row stainless steel ball bearings. Ball cage for reduced weight & friction.

These high load ball bearing blocks have steel sides for strength. They are ideal for halyards, tackles, runners in a dynamic, low load situation. Stainless steel sides for high strength/stiffness. One row stainless steel ball bearings. Ball cage for reduced weight & friction.

These high load ball bearing blocks have steel sides for strength. They are ideal for halyards, tackles, runners in a dynamic, low load situation. Stainless steel sides for high strength/stiffness. One row stainless steel ball bearings. Ball cage for reduced weight & friction.

These high load ball bearing blocks have steel sides for strength. They are ideal for halyards, tackles, runners in a dynamic, low load situation. Stainless steel sides for high strength/stiffness. One row stainless steel ball bearings. Ball cage for reduced weight & friction.

These high load ball bearing blocks have steel sides for strength. They are ideal for halyards, tackles, runners in a dynamic, low load situation. Stainless steel sides for high strength/stiffness. One row stainless steel ball bearings. Ball cage for reduced weight & friction.

These high load ball bearing blocks have steel sides for strength. They are ideal for halyards, tackles, runners in a dynamic, low load situation. Stainless steel sides for high strength/stiffness. One row stainless steel ball bearings. Ball cage for reduced weight & friction.

Selden Sheave Ball Bearing 25mm x 6mm x 8mm