Highest quality hypoallergenic skin-friendly self-adhesive hydrogel manufactured in Japan for medical-grade electrodes. ***Size: 5*5cm, a total of 24 pieces Compatible with TENS stimulators (Electro transcutaneous nerve stimulation) and EMS (Electro muscular stimulation); All electrodes comply with the Medical Device Directive, Class 1A. They are presented in a sealed reusable bag along with the instructions and can be used for up to 40 applications (depending on storage, skin type, preparation, and weather). Hypoallergenic and latex-free, specially designed for comfort and durability they adhere to all areas of the body. We are a UK Medical Company and NHS main supplier located in Manchester, with full product, and after sales/service support.