... long life The featuer of welding machine for plastic 1, It is small and convenient for working,Operate flexible and convenient ,handle ... 20kHz with original Japanese NTK coverter.3, Automatic frequency tracking.4, Especially suitable for 1-15mm spot welding.5, Riveting, ... excellent elements assembly, good quality and surable.7,Fix the rhinestone on clothes,shoes,trinkets,the spot welding for plastic ...