Color: Natural Wood Designed to be placed under piano legs to protect floors and carpets, as well as metal and brass wheels from rust or tarnish. Anti-slip EVA pad on the bottom helps prevent the piano from sliding and provides cushioning, shock absorption, and sound insulation. Made from high-quality hardwood with no splicing; hand-polished finish showcases natural wood grain for a beautiful appearance and enhanced durability. Can also be used as floor protectors for heavy wheelchairs, bed legs, or similar furniture. (Check inner dimensions before use with chairs, beds, or sofas.) Note: Due to the natural wood material, each caster cup may vary slightly in grain and color, which is normal. Specifications: - Includes 4 caster cups for upright pianos - Color: Natural Wood - Bottom diameter: 10.2 cm - Slot diameter: 5.2 cm - Item weight: 250 g (8.81 oz) for 4 pieces - Package dimensions: 10.5 x 10.5 x 10 cm - Package weight: 300 g (10.58 oz)