Explore your partners backdoor with this open-tunnel anal plug! Firm yet flexible, this anal toy delivers that satisfying â  fillingâ   sensation of a regular plug, but also features a hollow-bodied design allowing access that no other plug can. Insert fingers, lube, or even a vibrator right through the tunnel. Thick, cushioned material with a unique diamond-shaped base is flexible and designed for all day wearability. Experience endless sex play possibilities. From Doc Johnson. Material: PVC. Total length: 4.7 inches. Insertable length: 4.3 inches. Width: 1.7 inches. Circumference: 5.43 inches.