The Twisty Nipple Suckers from Size Up are a great add-on for any spicy night. The transparent chambers allow for sensual viewing for solo or partner-play. and the easy-to-use twisting knob allows for precise pressure selection for custom suction sensitivity. Also included in the box are a pair of non-piercing nipple rings.- Materials: 100% ABS Plastic- Weight: 54 grams- Length: 10.5 cm- Width: 1.9 cm- Height: 1.9 cm