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 finish and enhanced durability. These caster cups can also be used as floor protectors for heavy wheelchairs, beds, chairs, and sofas. Note: 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 piano 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)