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, shockproof, and soundproof functionality. Made from high-quality hardwood with no splicing; hand-polished for a natural wood grain appearance, offering a beautiful, durable finish. These caster cups can also be used as floor protectors for heavy wheelchairs, beds, and other furniture. Note: Please check the inner size before purchase if intended for use with chair, bed, or sofa legs. The natural wood texture may cause slight variations in color and grain between individual caster cups, 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)