Kink Ring and Plug Set Silicone and Stainless Steel Cock Accessory. Ready to experience new extremes of cock pleasing pleasure? Urethral sounding and plug play are accessible to all in this pre-assembled set of four stainless steel urethral plugs on premium silicone cock rings. These products require no assembly and are easily sterilized for use, so they are ready when you are. Each plug spans a variety of shapes and widths, encouraging users to experiment and train. The Kink by Doc Johnson Silicone, Stainless Steel Ring and Plug set also includes a branded neoprene case for clean, discreet storage and travel, and full instructions for safe and hygienic use. Kink by Doc Johnson is an exciting collaboration with Kink.com to create a collection of high quality authentic fetish items suitable for long term practitioners and new initiates alike. Features: Stainless Steel urethral plugs on premium Silicone cock rings. 4 different plug shapes. No assembly required. Perfect for beginners. Includes Neoprene case for storage or travel. Easy to sterilize. Hypoallergenic, phthalate free and body safe. Includes full instructions for use. Specifications: Color Black. UPC Code 782421065102. Materials Silicone, Stainless Steel.