Curvy, completely unique, and excitingly multipurpose, this innovative plug from Perfect Fit, aside from its double-barreled, strategically wide shape and firm yet comfortably pliable texture also showcases a creative hollow-bodied design. Very effectively holding the anus open while simultaneously stimulating the nerve ending rich backdoor canal and rectum, the Double Tunnels' pleasure possibilities are truly staggering. Apart from providing that much-loved full feeling during sex, foreplay and masturbation, the dual open-ended form allows probes, fingers, vibes and more to find their way easily and precisely. Extra wide at the flared base, the Tunnel's smooth, straight neck provides a grip-point for the anal muscles, helping to keep the plug in place while protecting against too-deep penetration. To insert, cover the tip of the Tunnel with lots of good water based lubricant and gently push into place- any firm dildo or similar toy slipped inside the hollow interior will lend some stability during placement. Made of Perfect Fit's signature PF Blend of silicone and TPR, the Double Tunnel is perfectly safe for even very sensitive skin, it's completely odor free and ultra-durable. Compatible with water based lubricants. The Medium Double Tunnel Plug has an inner diameter of 1 inch (2.54cm).