Master® sailboat plain bearing blocks come in size from 35mm~90mm.35mm blocks are designed for sailboats,dinghies and control lines of all different configurations.One mode cleat arm is set to optimum angle. The exclusive engineering plastic ball bearing provides sheave with good rotation and less friction.All master blocks are UV- and corrosion-resistant for durable lifespan.Sideplate is made by stiff glass reinforced nylon composite.All the rivet,shackle and central Pin are SUS316L stainless steel.
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