2pcs 3" Spring Cable Pulley Wheel, Spring Pulley Block 304 Stainless Steel Bearing Inside Heavy Duty

SUITABLE SIZE: The wheel diameter is 2.7 inches (68 mm) and the groove width is 0.87 inches (22 mm). STAINLESS STEEL MATERIAL: The groove casters are made of 304 stainless steel which has higher strength, better capability of resisting rust and corrosion. SPRING UNIVERSAL WHEEL: The spring top ring helps to prevent rope, cable or wire from knotting, and provide convenient use for ease wire handling or door sliding. QUIET SLIDING: Two rolling bearings built in the groove wheel can reduce the friction with the wheel for stable and quiet sliding. WIDE APPLICATION: The plate caster can be used to inverted track, yard gate, rolling gate, patio sliding gate, industrial machines, wire rope rail device, factory door, etc.