Designed to inspire creative anal play potential, the SONO collection offers up the No.51 Hollow Tunnel Plug, a unique tool meant to hold the anus and sphincter open while stimulating and stretching backdoor sweet spots.Easily providing an exciting full feeling during sex, foreplay and masturbation, the dual open-ended shape allows probes, fingers, vibes and more to find their way into the anal canal easily. Extra wide at the flared base, the Hollow's smooth neck helps keep the swollen shape in place while protecting against too-deep penetration. To insert, cover the tip of the plug with lots of a 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. In soft body safe TPE, the #51 cleans easily using warm soapy water or a good toy care fluid/foam. Compatible with any favorite water-based lubricant.