... , sheaves,rope sheave,or idler wheel plastic idler pulley Used for Windows, Door, Transportation Mechanical Device, ... Trolly, Toy, Trunk, Elevatorplastic idler pulley Features and Benefits :Self lubricatingHigh tensile strengthCorrosion and ... fatigue resistanceLower water absorptionVery low frictionTypes:Single wheel pulleyDouble wheel pulley /complex 2-side movable pulleysSwivel eye ...