Multifunctional limb clamp, nickel plated, 4PCS/package, suitable for lead wire connection of 3.0mm pins, 4.0mm banana plugs and 4.0mm snap fasteners. Compatible with all domestic and foreign electrocardiograph machines. Recommended compatible brands: Nihon Kohden, Shanghai Kohden, Bangjian, Comedic, Burdick, Fukuda, Suzuken, NEC. Two specifications for adults and children are available.