... Specification: Φ58 ×1,800mm with heat pipe, resistance cold -352) Three-layer concentric borosilicate glass tubes3) Inner tank: SUS304 -2B , thickness: 1 ... .2mm4) Outer tank: Stainless steel, thickness: 0.41mm5) Insulating layer is high dense polyurethane foam, thickness: 55mm6) Brackets are stainless ...