Low friction ring for 3mm line, bore dia 7mm, overall dia 12mm, weight 1.5gms and safe working load 650kgs, the PTFE coating seals each unit creating an extremely low friction surface. Friction is only increased by 15% compared to a plain bearing block. Up to 250% stronger, constructed from HE30 marine grade aluminium and anodised to 40 microns. Up to a 90% reduction in weight