Hollow plug with a base that can be filled with liquid. There is a removable stopper (3.7 cm long, Ø 2.5 cm) that prevents the liquid from leaking out of the plug. Complete length 10 cm, insertion depth 8.5 cm. Outer Ø 3 to 5 cm, inner Ø 2.5 cm. black. Material: silicone, phthalate-free according to EU Regulation REACH.