20 Pieces Super Value package: 10 Pairs of electrode pads, totally 20 pieces snap-on pads coming in 3 size, small (1.2''×1.6''), medium (1.6''×1.8''), and large (2''×4'') sizes. Different size pads target different parts offer you a better massage experience. Standard 3.5mm Snap-on Connector: Our electrode pads are compatible with TENS of brand Belifu, NueMedics, TECHCARE, NURSAL, MEDVICE, TENKER. Best replacement pads fit for all TENS device which uses the industry-standard 3.5mm snap-on connectors. Premium American-made Adhesive: The electrode gel is made by an industry-leading American adhesive company, bio-compatible, non-irritating, latex-free and superior environmental adaptability of hydro-gel. Provides excellent self-adhesive performance.