... Certificate. 3.Warranty 1 year. AIR PLASMA CUTTING MACHINE(LGK-40/63/100/120)FEATURES:1. ... cutting in DC,two positions regulation of current,HF ARC starting with cantact,usable curve cutting fleetly.2.High cutting speed,Narrow cutting gap,smoth cutting ... safety and durable.3.Widly use for cutting canbon steel,stainless steel,alloy steel,copper ... ,carton box. AIR PLASMA CUTTING MACHINE LGK-40/63/100/120