Double Fuk Clear. Strap-on pleasure for two with a bendable spine. Double dong features 4 powerful vibration modes. Made using phthalates free, non-toxic materials. RoHS compliant. Materials dong PVC, elastic straps, power control ABS plastic. Vibrating sex toy requires 2 AA batteries, not included. Do not leave batteries in the vibrator between uses. Dong measures 13 inches long. A water based lubricant is recommended. Always clean before and after use. One size fits most. Double Fuk from Nasstoys of New York. The Ultimate Love Toy Company. New image for 2013.