Replace your worn electrode pads with Pure Enrichment PurePulse TENS unit pads. These reusable TENS pads feel soft and help deliver the relief you need to targeted areas of the body. Soft foam conforms to the shape of your body for secure, comfortable placement. Plastic storage card helps preserve the adhesive between sessions. Compatible with the PurePulse TENS unit and most other portable, handheld TENS electronic pulse massagers. Set includes 20 total TENS unit replacement pads (5 packs of 4).