Our tens unit pads Fits all TENs EMS Units and tens electrodes massagers with a 3.5mm pin in the Market - Pin Size 3.5mm diameter20 pads total 10 sets of 2 pads High Quality Premium Reusable Gel Large Sized Electrodes for Tens , EMS and Massager Use - 3" by 1.77" inches Perfect for Professional and Home Use. Safe and Effective.Each Electrode Pad comes with Multi- Self stick Reusable Premium Quality Each Electrode Pad comes with Multi- Self stick Reusable Premium Quality and Soothing Adhesive Gel that can be Used Multiple Times per Pad- Pregelled for easy and durable use. Pads are flexible and long lasting. Double Sealed for Long Lasting Freshness.Tens Pads stay on and are easy to take off when you need to. These electrode pads are comfortable, flexible,and durable for long term tens unit and massager use. Please cleanse and dry the skin area before use for best results.Owned by a Proud American - Pads Made with Self Sticking High Quality Gel for Tens Units EMS Machines and Electric Massagers for more uses- Please discontinue use immediately if any discomfort occurs and please do not use longer than 10 minutes per session per pad at 5 hour intervals. Do not use or purchase if you have sensitive skin.