The Slipstop Endpin Holder provides a secure, non-slip base for cello and double bass endpins, helping keep the instrument firmly in place while protecting floors from scratches and damage. It features a sturdy metal plate with a sponge rubber base that grips the floor without requiring attachment to a chair or other surface. 9cm diameter in White. Also referred to as a Cello Donut or Endpin Stopper. Made in the USA.