189-TS4000ZKC Features: -Instant on-off trigger for fuel saving and convenience.-Lock button keeps torch lit for finger-free use.-Replaceable brass tip.-Swirl flame for optimal heat output.-Pressure regulated to operate in all directions.-Cast aluminum body and stainless steel burntube for durability.-Stainless steel burntube that rotates 360 degrees.-Push button igniter.-Swivel action flame that heats up work area quickly.-Gas Type: MAPP (Methyl Acetylene-Propadiene).-Process: Brazing, Soldering, Sweating, Melting, Heating.