The Jack Master is a premium self contained masturbator of the finest order. Its 7" x 3.25" and made from superior hygenic material. It has a dual sided pleasure chamber with unique tinglers and ridges and the FLEX GRIP design for controlled pressure. The unit opens easily for cleaning purposes comes in a discreet case for easy travel. It was recently voted 1 Masturbator by the American Pumpers Association, and they certainly wouldnt pull your leg.