... and so on Features:1. Self-adhesive, reusable, durable 2. Soft cloth, foam, tan tricot , Non-woven, ... socket fit male pin size from 1.95 to 2.1mm5. Durable integral structure: Highest integral intensity, ... damage6. Reusability: More repeated use without diminished effectivenessMini 2 years, will not turn yellow or become thin7. ... TENS machine electrode Round TENS machine electrodes with all-weather gel