Seldén 100mm Single + Becket - Plain Bearing (410-001-02R) is a 100 mm single-sheave, with becket plain-bearing block. It is intended for steady or comparatively heavy control loads where a simple, durable bearing arrangement is preferred. A plain bearing block handling up to 4 ton load.The block features a plain bearing with acetal bushing and two axial Delrin bearings - these stabilize the sheave when the rope enters or exits. Select the block by line diameter, working load and attachment style, and compare the article number when replacing existing Seldén hardware. For new installations, make sure the supporting eye, padeye or deck structure is suitable for the expected load and that the block can align naturally with the rope lead.