... bar steel 7.8 mm, aluminum handle iron trigger,gun body surface chromium plating,handle the trigger pensu Namesoft glue ... round bar steel 7.8 mm, aluminum handle iron trigger, gun body surface chromium plating, handle the trigger pensuG/N(KG ... . compatible with over 95% of cartridges on the marketApplicationwhere the use of a cartridge product reuqires a caulking gun(adhesive, sealants, fillers, etc ...