Pro-Clinical Lead Wires TYPE B. * These are Premium Clinical Grade lead wires for use only with our latest clinical machines. * The core is 3x as thick as most generic lead wires made extra durable for clinical use. * These lead wires are specially designed to fit the following models: Quattro II Quattro 2.5 Combo Care. * Quantity: 2 per pack. * These are the TYPE B lead wires with male pin connections on one side and plug jack connector on the other.