This velvet-soft silicone plug by Master Series starts large and gets larger, inflating as the attached pump bulb is squeezed. Deflated, the plug is generously proportioned at a full length of 7.8 inches, insertable length of 5 inches, neck diameter of 1.8 inches, and widest insertable diameter of 2.1 inches. It has a rounded tip and a tapered shape that facilitates easy insertion with the help of water-based lubricant. Once inserted, the pump bulb, connected to the base of the plug with a flexible tube, can be squeezed to expand the plug to the maximum width of 3.3 inches.

When the fun is done, deflate the plug with a twist of the copper air valve, and clean with warm water and a disinfectant toy cleaner.