Piano Caster Cups, ABS,Anti-Slip & Reduce Noise-HONTECH STRONG & ANTi SLIP- Piano Caster Cups Made With High Quality ABS Material Will Keep Piano In a Fixed Place. REDUCE NOISE  FELT Pad Under Piano Caster Cups Will Absorbs vibration And Reduces Noise. PROTECTS WOOD,TILE & CARPETS  Piano Caster Cups Protects Wood Floor ,Tile And Carpet From Caster Damage. PROTECTS PIANO ORIGINAL WHEEL  Piano Caster Cups Protects Wheels from Rust Or Tarnish ELEGANT DESIGN - Enhances Piano And Room Classy Looking.