This kind of beer keg is made of SUS304 stainless steel, which inside and outside, with PU thermal layer and two beer pouring tips, upper tip and bottom tip and the outer shell is impacted by many precision models and welded by argon arc welding technology. The main types are welding technology. The main types are 2L, 10L, 15L, 20L, 25L, 30L, 50L. And we can design the keg according as client's demand.