Santamedical TENS Unit Replacement Pads 2x2 40 Pcs Premium Reusable Electrode Pads - Self Adhesive Electro Therapy Patches for Electrical Stimulation - Non Irritating Stim Pads DesignUNIVERSAL COMPATIBILITY Tens unit pads have universal compatibility with all machines with pigtail connection. Flexible, comfortable, easy to apply, sticks on lasting comfort and easy to peel off. Huge 40 piece set. SECURELY PACKAGED Tens pads medical electrodes are packed in resealable bag for durability. Compatible with all TENS and EMS units with pigtail connection. TRUSTED QUALITY Tens reusable pads electrodes are used for electro stim TENS