Rinastore Grand Piano Solid Hard wood Caster Cups Pads - Set of 3 (Solid Wood PA-20) HIGH QUALITY WOOD - Made of solid hard wood(WHITE OAK), durable & secure support. ANTI-SHOCK EVA FOAM MAT - Each cup is lined with EVA pad have sound-proof antiskid effect STRONG & SECURE SUPPORT - Protect floor from scratch causing by piano. Underside of each cup is lined with felt pad have sound-proof antiskid effect For grand piano stand-set of 3.