Woodi Piano Caster Cups WPA-18 - Set of 4 ABS Plastic Marble-Simulated 4-Inch Wheel Protectors for Grand & Upright Pianos - Protect Hardwood Floors & Reduce Noise

These ABS Plastic Piano Caster Cups are designed by Woodi to be placed under a piano's legs in order to protect floors and carpets. Caster cups are critical in the protection of hardwood floors, carpets, tile, and other flooring materials. It has felt on the bottom.