The Vortex.It's the stroker that tightens right where you need it! Let your imagination run wild with the life-like grip of the center pleasure ring that squeezes just like the real thing! With two nice and tight channels to choose from and groove textures that will throw you over the edge, the super soft TPE stretches up to meet you with every stroke. Stroker with two tightening channels. 1” diameter opening at large end. .58” diameter opening at small end. Both channels have grooved textures. Tightening ring in center of stroker. Pin holes on exterior for steady grip. Made from super stretchy & soft TPE rubber. Length: 6”, Depth: 2.54”, Width: 2.54” Five Year Warranty.