The Double Tunnel Plug . Butt plug features two plugs that slightly taper to the tip which makes it one of the most innovative butt plugs available on the market. 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 version also makes it possible to see right into the other person. It is made of special blend of silicone and Thermoplastic Rubber TPR called Perfect Fit Blend. It is safe with all lubes. Wash thoroughly with mild soap and water. This product is not compatible with latex. 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. Dimensions for Large size double tunnel plug 4.5 inches insertion length by 8.8 inches in circumference. The Double Tunnel Plug Large from Perfect Fit Brands. 18