Why Jack it when you can Jack-ItWith its silky soft clear exterior. and liquid-like colored interior. there has never been a stroker like the Duo. Add a drop of lube to the colored. textured channel. and the sensation is absolutely mind boggling. What`s more. its ample size is meant to fit a man`s hand. and its exterior grip provides no-slip. non-stop pleasure. Its revolutionary design instantly transmits additional sensation with every flex of your hand. Into strokers? You don`t know jack - until you JackIt!Smooth. tight opening for heightened sensation starting right at entry.Jelly-nubs and ridges for the feel of real.