Two Self-Adhesive Gel Refills Included No mess, Drug-Free, Odor-Free Soft and Flexible Easy to Apply Up to 100 uses per refill pack HoMedics Rapid Relief Self-Adhesive Gel Refills are used for model HW-P100 and HW-P105 Rapid Relief Electronic Pain Relief Leg and Back Pads. Two easy to apply, self-adhesive gel refills are included. They are soft and flexible, no mess, drug-free and odor-free. Up to 100 uses per refill pack.