Don't be fooled by cheaper off-the-shelf caster cups made for household furniture! The new and improved design of these caster cups offers an economical, yet durable option for protecting your floors from piano caster damage. These piano caster cups are designed to withstand and support the weight of your piano while protecting your floors. Will work on wood floors, tile floors, and even carpet. New, Specially designed to absorb the weight of a grand piano and increase surface area on the floor, minimizing any kind of damage to your floors. We only sell piano supplies and accessories, These solid, hardwood maple piano caster cups provide enduring beauty and protection, and are designed to withstand and support the weight of your piano while protecting your floors.