Set of 4 Square Tens/EMS Machine Electrodes (Self Adhesive)So you will receive a total of 4 electrode pads which will fit most types of TENS/EMS machines on the market.These electrodes will fit all lead wires that have pin connectors with diameters of 1.96mm to 2.04mm (which basically covers all lead wires on the market with the \'pin\' connection)They fit the majority of machines sold by Lloyds, Boots, BodyClock, Babycare, NeuroTrac, Natures Gate, TPN and Easy Tens.These Ten Electrodes Pads will last between 20 - 30 applications and are designed to be reusable, comfortable, durable and long lasting. Features:Pin Connector Size: 1.96mm to 2.04mmSelf Adhesive Electrodes