General description 4-Piece Piano Floor Protector Caster Cups are designed to provide better floor protection for your piano. These round beech wood caster cups distribute the weight of the piano's wheels, preventing scratches on your floor while enhancing stability. The EVA mat on the bottom ensures a non-slip grip, keeping the piano firmly in place and minimizing vibrations that could disturb neighbors. Technical specifications Material: Beech wood Bottom material: EVA Quantity: 4 pieces Usage Place the caster cups under the piano wheels to protect the floor. Utilize the non-slip EVA pads to reduce shock and vibrations. Separate the piano from direct contact with the floor to prevent moisture damage.