Material: Solid Wood - Genuine black walnut, sapele (African mahogany), zebrawood, rosewood/jacaranda, oak wood options. Piano Leg Protectors - Prevents metal and brass casters from rusting or tarnishing. Designed for Upright Pianos - Set of 4. Protects Floors and Carpets - The underside of each cup is lined with non-slip felt for floor protection, insulation, and slip resistance. Natural Wood Grain Variation - You will notice a slight color difference on each cup, which is due to the natural wood grain. 100% Hardwood - High-quality wood will keep the piano in place, reducing force on the floor and protecting both wood and carpet from damage caused by the casters. Shock-Absorbing EVA Foam Mat EVA Foam Mat Shock-absorbing, vibration-dampening, and noise-reducing without scratching floors. Elegant design. Piano wheel protection: protects metal and brass wheels from rust and tarnishing. Enhances the beauty of the piano and the room, providing a truly chic look.