Provides maximum grip and floor protection * Ideal for bed style wheels 2-Inch to 2-1/4-Inch * Can be used under legs with a diameter of 2-3/8-Inch to 2-5/8-Inch * Protects hardwood, laminate and ceramic tile floors * Patented Slipstick large castor cup is designed for castor wheels. It contains an O"ring specially formulated to protect floors and stop furniture on wheels from moving.