1.Inner tank: SUS304-2B or 316L food-grade stainless steel ,laser welding technology
2.Vacuum tube:High efficient coating 47X1500mm/58*1800mm vacuum tube ,Hail resistance:25mm-40mm
3.Outer tank: Painted/aluminum zinc coated steel/SUS 304 stainless steel ,free welding technology
4.Insulation layer: High density polyurethane ,72 hours efficient heat preservation