Blush Novelties Performance Silicone Cock Rings. Performance Cock rings tighten the bloodstream flow within the penis, which will help a erection and increases stamina. They may also heighten sensitivity making orgasms more serious! Becasue it is silicone it may be completely sanitized. Performance Rings are extremely comfortable and stretchy. It may be extended as much as two times its original diameter. 3 pack. For you and your spouse. Specifications: stretchy and powerful. Non-porous. Hypo-allergenic. Phthalate free, non-toxic materials made using pure silicone. Pack of three same size rings 1.75 inches across. Product Dimensions: 1.75 Width. Bulk Weight: .3 ounce. Product Package Dimension: 3.9 inches H by 3.5 inches W by .8 inch D. Packaged Product Weight .6 ounce