Originating from alternative Chinese medicine, à cupping" is currently also used in BDSM. Place the Vibrating Suction Cups onto the skin, so a vacuum is created on the skin. This already creates strong stimulation. Using the one-speed vibrating bullet, the stimulation will be all the more powerful.Specifications: Diameter: 68 mm. Product Height: 38 mm. Material: Silicone. Phthalate free: Yes. Batteries: 1x AG5 Included. Black. From Shots America.