The K-fit Loop Adaptor for Prolapse works with the K-fit Kegel Toner. It is 1 1/8" in diameter at its widest point. To connect to other devices, you must have two 2 mm pin connectors on a lead wire from your machine. PROBE DOES NOT COME WITH CONNECTING WIRE. The K-fit Loop Adaptor for Prolapse directs energy to the pelvic floor to facilitate toning, muscle strengthening, and general wellness, and is suitable for women with rectal prolapse. The K-fit Loop Adaptor for Prolapse cannot be used; while pregnant, if you have been fitted with an implanted insulin pump, or if you have a pacemaker. Please use caution if you are attaching the K-fit Loop Adaptor for Prolapse to an EMS or TENS device that is not intended for pelvic floor work.