Black soft phthalate-free vinyl.
A great choice if you find the Large Three Bangs Up Your Butt a bit scary... this one gets you started on the way to pop-pop-pop-heaven!
As extra it has a suctioncup so you can stick it to a smooth surface so you can better ride on it.
Lenght: 27 cm. (11 inch), Diameter: 5 cm. (2,5 inch) at the top and 7,5 cm. (3 inch) at the bottom.