The Rook is the newest version of the best selling Tunnel Plug, It has a longer and thinner design that features a bulb head that tapers to the base which makes it easy to insert. In addition to being a standard butt plug, you can use the tunnel hole that goes all the way through the plug for various play including lube insertion, fingers, and water sports. The clear version has the added benefit of someone actually able to see right into it. Made of PF Blend a proprietary blend of Silicone and Thermoplastic Rubber TPR developed to provide superior stretch, comfort, and durability. The Inner circumference is 2.2 inches, 3.4 inches and the outer circumference is 7.7 inches. The Rook is safe with water based lubes. This product is not compatible with Latex products. Wash thoroughly with mild soap and water. Store separately. Perfect Fit Brand Products are sold, and intended for use strictly as adult novelty toys for entertainment. They are not intended for medical use and have not been clinically tested. No medical claims are warranted or implied by the use of these products.