Simply Strapless Large Black from Si Novelties. Vibrating strapless strap on with double ends. A smaller bulb for the wearer and a larger end for the partner. Large strapless strap on length 6.89 inches, diameter 1.6 inches. Bulb length 2.95 inches, diameter 1.5 inches. Features: 10 function bullet vibrator. Silky feel Silicone. Hypoallergenic. Phthalate free. Vibrator requires 3AG13/LR44 batteries, included.