All F-Machines are supplied with a Vac-u-Lock style adapter as standard, which are compatible with Doc Johnson Vac-u-Lock dildos and toys.F-Machine brings you the brand new Universal Suction Base (USB). This revolutionary bolt on system integrates your favourite suction (/flared) base sex toys with either your F-Machine Pro II or Gigolo. With this fantastic innovation from the pervy engineers at F-Machine, you can now choose which style of toy to use on your machine and discover new possibilities for sexual play & fantasy.