Function: 1 This cello anti-slip stopper is made of cello-specific wood that provides stable non-slip and reliable performance. 2. The cello anti-slip mat is thick with oxford cloth, durable and adjustable, the length is adjustable from 36cm/14.2in to 70cm/27.6in. 3 The back of this non-skid stopper for cello is made of thick non-slip sponge which increases friction and makes it more stable. 4 This cello anti-slip stopper takes up little space so you can carry it while playing outdoors. 5 The non-skid stopper for cello is easy to use, wont scratch floors, and protects your floors while protecting your piano. Specifications: Item Type: Cello Stopper Size: Length: Approx. 36-70cm /14.2-27.6in (Adjustable) Material: Oxford cloth and wood Package List: 1 x cello stopper.