k-fit kegel toner loop adaptor for prolapse k-fit 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.