Loose silicone suction cup with plastic screw to screw on the desired silicone dildo. We have 5 models available. # 9136/# 9137/# 9138/# 9139/# 9140. When the dildo is attached to the suction cup, the dildo can be glued to a smooth surface and can also easily be used on almost any strap-on or strap-on.