Erection pump with flanged base for secure seal Soft and stretchy removable donut Easy squeeze bulb with quick air release valve Stretchy and comfortable extender Adds 2/5 cm to length Textured ribbing inside and out Discreetly enhances both length and girth Super-stretchy. strong and pliable cage enhancer Added scrotum ring for support and secure placement 2 sizes of stretchy erection enhancer rings Fits securely on the base of erection pump cylinders Slides easily from cylinder to penis to maintain erection PS (cylinder) Phthalate-Free PVC (hose. bulb) ABS (release valve) TPE (donut) TPR (extender. enhancer) Silicone (rings) Requires 6 Watch Batteries (12 Included)