Features: Non-woven Fabric,soft and comfortable and will not irritate Self adhesive, high conductive, convenient to use and reusable. Long lasting and reusable adhesive Excellent conductivity Bio-compatible, Dry out Resisting Molded wire connector for reliability and durability Useful and safe accessory for medical care. Fits most TENS, EMS & IF Units using pigtail pin type connectors Type: electrode pads Color:White + Black Material: silicone gel + Non-woven FabricSize: 5x9cm/1.97*3.54in Fit for 2mm connector Package includes 10/12/20/40pcs Note:1. Cleanse your skin before using electrode pads for better results.2. Normally each pad can be used for 20-30 times.If they become unsticky,just throw them away and use a new set.3. Please allow 1-2mm measuring deviation due to manual measurement. 4.There maybe slight color difference because of light ray, but it does not affect use!