Vacuum stimulator pump. Designed to increase the volume of the penis due to stretching of tissues during the vacuum massage, you can use it either immediately before sexual intercourse to achieve maximum erection (which can be fixed immediately with an erection ring), or systematically to achieve the effect of increasing the size of the phallus in the erect state (max. 2 5 cm). Material: Plastic. Length: 18.0 cm. Width: 4.5 cm.