Sex machines purchased from RoddickGEAR.com come with either (or both) of two dildo attachment systems, pictured at left. Note that dildos are shown for reference only, and that I neither include nor sell dildos. On top is the Vac-U-Lock Dildo System (VUL). This system requires specialized Vac-U-Lock dildos. On bottom is the Standard Dildo System, for use with most dildos that have a wide or flared base, particularly "balls