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