Master Series Deluxe Neoprene Vault Ball Stretcher plus Cock Ring Black. This versatile piece holds him in place while helping to maintain his erection. The firm, yet flexible neoprene material is lightweight, and the removable cock ring lets you wear both the stretcher and the ring at once, or just one at a time. The Vault is fully adjustable, and once securely fastened, he will not be going anywhere. Measurements ball stretcher adjusts from 5.5 inches to 7 inches around, and is 1.5 inches wide. Cock Ring adjusts from 5 inches to 6.5 inches around, and is 0.75 inch wide. Materials Neoprene, Metal. Color Black.