Experience powerful suction on your nipples and clitoris when you play with this easy-to-use sucker set Without the complication of bulky tubes and pumps, this set draws blood into your desired area, engorging and enhancing sensitivity Place each cylinder flush against the skin and use the simple twist mechanism to increase pressure within the vacuum. Experiment while you masturbate or share the excitement with a partner Your nipples and clit will be even more responsive while they're temporarily enlarged Measurements: Nipple suckers have an inner diameter of 1.5 inches, with a maximum depth of 1.25 inches. Clitoral cylinder has an inner diameter of .75 inches, with a maximum depth of 1.25 inches. Material: ABS plastic, acrylic. Color: Clear.