DAISY*VZU Pet Cat Kitten Kitty Toy Rolling Sisal Scratching Post 3 Trapped Ball random col Color: random color Material: sisal Size: about 28 x 7.5 cm This product is made of natural sisal. There are 3 small balls with sand sound inside the roller. This toy can help to train and exercise its brain and sense organ and avoid the occurrence of depression even if its owner is out.