Touch Proof Lead Wire 48” (1.2cm) is a latex-Free replacement lead wires for Impulse 3000, Impulse 2000, BioMed 2000 XL, BioMed 2000 XT, Micro Plus, BioStim Plus, BioStim SD, BioStim M7, EMS 2000, Impulse TENS D7, BioStim NMS2, BioStim INF and INF Plus devices that were manufactured after May of 1999.