Beyond A Purchase: We're committed to provide the best products and service to our customers. For any questions about the product, please feel free to contact us. Thoughtful Design: The unique tab makes TENS machine pads easy to remove, thus protect the gel. The double-sealed bag prolongs pads' lifespan and ensures the pads are delivered in unopened condition. Reusable Pads: AVCOO TENS unit electrode pads use industry-leading American gel to ensure an excellent and durable stickiness which allows for unraveled lifespan of over 100 reuses. Premium, Medical-grade Electrodes: CE, RoHS certified and FDA cleared, AVCOO TENS unit muscle stimulator pads are latex-free, and non-irritating to all skin types. 20-Pack Pads: AVCOO palm-shaped TENS Pads fit all TENS/EMS devices (except for wireless TENS unit) that use snap-on connector (3.5mm) leads, and perfectly match your elbow, knee, shoulder, back, etc.