Hankey's Toys Heavy Duty 4" Suction Cup Attachment The Hankey's Toys Heavy Duty 4" Suction Cup Attachment is compatible with toys with an attachment hole. This suction cup has a heavy duty, 100% silicone base with an aluminum prong that is long enough to get a good, strong grip on your toy. It is meant to be used to hold your dildo vertically. Depending on the size and weight of your toys, it is not recommended for use on a wall. This suction cup is high quality and sticks incredibly well to most smooth, clean, non-porous surfaces! Compatible with Vac-U-Lock and Lock On style toys. Please first verify your toy has compatible measurements. NOTE: Dildo pictured is not included. MEASUREMENTS: The 4" Suction Cup is designed for toys smaller than or equal in size to LG or LG/XL - approximately 10.75" overall length The 7" Suction Cup is designed for for toys larger than XL - approximately 13" overall length TIPS: Applying a small amount of lube on the underside of the suction cup will greatly improve performance and prolong the seal during play. Apply the suction cup to the surface first before attaching the toy. Press suction cup down hard onto non-porous surface until it sticks and remains attached to surface, then insert toy onto prong. Always apply a small amount of lube to the prong prior to inserting into your toy to prevent splitting and chipping around the toy's attachment hole. Use care when inserting and removing prong from toy to avoid damage to the toy's attachment hole.