1)material:copper,red copper 2)CE & ISO9001:2000 cert 3)models:180a,200a,350a,500a 4)High quality Panasonic 500A welding torch nozzle 1)material:copper,red copper 2)CE & ISO9001:2000 cert 3)models:180a,200a,350a,500a 4)High quality Panasonic 500A welding torch nozzle