Tweak nipple suckers create powerful natural suction for authentic sensations and engorgement that traditional clips cannot provide. With a simple squeeze, the Tweak set fits perfectly against the skin and creates a strong seal for hands-free fun?just attach to each nipple and watch them swell through the visually stimulating sheer black material. Measurements: 1.75 inches in length, 1 inch in diameter. Material: TPE. Color: Black.