These pads fit the XTF or WNL Practi-Trainer. Good for about 100 stick/remove sessions, these AED training pads are non-functional so they cannot be used to deliver a defibrillation shock. Pads come sealed in a re-closable zippered bag so your students will have a more realistic AED skill session. Proper placement is detailed on each pad. They do not leave any residue and conform perfectly to the manikin's torso.