Transparent penis pump with a knobbed inner sleeve (Ø 4.5 cm flexible, length approx. 20 cm) and handy pump ball. You can see the success of how much your penis has increased by with the scale. With a safety pressure valve. Cylinder approx. 25 cm long. Material: ABS, TPE (sleeve), PVC (pump ball), phthalate-free according to EU Regulation REACH.