Features:  Rotation: 360° universal rotation, lightweight, multi-angle rotation, suitable for all kinds of scenes, so that the moving object is no longer difficult  Widen: The width of the wheel is large, stable, the width of the wheel is large and the bearing is strong, so that the use of the wheel is more durable  Clip Spring Insert Rod: The wheel adopts clip spring insert rod, the height is enough, convenient maintenance and replacement of the wheel.  Protective: Wide and thick dustproof board, wheel style dustproof board is optional, effective daily protection of wheels.  Solid Bearing: Solid bearing is better connected to the wheel, enabling the wheel to turn flexibly and quickly.    Specification  Material: PU  Color: Black  Caster dia: About 50mm/1.97inch  Caster width: ABout 59mm/2.3inch  Installation height: About 56mm/2.2inch  Insert rod dia: About 11mm/0.4inch  Insert rod height: About 22mm/0.87inch    Package included:  5pcs x Chair Caster