Description Color: Natural Wood Features: 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 at the bottom prevents the piano from sliding and provides cushioning, shock absorption, and sound insulation. Made from high-quality hardwood with no splicing; hand-polished for a natural wood grain appearance, offering a beautiful, durable finish. Can also be used as floor protectors for heavy wheelchairs, bed legs, or similar furniture. Please check the inner dimensions before purchasing if intended for use with chair, bed, or sofa legs. Note: Due to the natural wood material, each caster cup may vary slightly in grain and color, which is normal. Specifications: Product: Caster cups for upright piano, pack of 4 pieces Color: Natural Wood Size: Bottom diameter 10.2cm / Slot diameter 5.2cm Item Weight: 250g (8.81oz) for 4 pieces Package Size: 10.5 x 10.5 x 10cm (4.1 x 4.1 x 3.9in) Package Weight: 300g (10.58oz)