These TENS and EMS Machines Electrode Leads and Wires will fit only NeuroTrac Machines. They are designed to fit all Neurotrac Machines shown below:NeuroTrac® PelviToneNeuroTrac® SportsNeuroTrac® TENSNeuroTrac® Sports XLNeuroTrac® SimplexNeuroTrac® RehabNeuroTrac® Obstetric TENSNeuroTrac® MyoPlusNeuroTrac® ContinenceNeuroTrac® MyoPlus2NeuroTrac® MultiTENSThe picture shown is showing 1 lead (The white end fits into the machine, and the black and red attach to your electrodes). They are sold in pairs, so you will receive 2 leads.