Features: Color: Natural Wood Designed to be placed under a piano's legs to protect floors and carpets, metal and brass wheels from rust or tarnish.Anti-slip EVA pad at the bottom can prevent the piano from sliding and play a role of cushioning and shockproof soundproof. Selected high quality hardwood, no splicing, hand polished natural wood grain beautiful atmosphere, delicate more durable.They also work as heavy wheel chair floor protectors and bed leg floor protectors.(Mind the inner size before purchase if you will use them as chair/bed/sofa leg protectors.) Note: The natural wood texture makes each piano caster cups slightly different in texture and color, this is normal. Specifications: Caster cups for upright piano, pack of 4pcs. Color: Natural Wood Size: Bottom diameter 10.2cm / Slot diameter 5.2cmItem