1. Inner tank is with copper coil or stainless steel (S/S) coil.
2. Stainless steel(S/S) coil: φ 16mm;
Copper coil: φ 12mm
3. Inner tank is 0.5mm SUS304 stainless steel.
Outer tank is 0.4mm SUS304 stainless steel.
4. Frame is 1.2mm stainless steel or 2.0mm aluminum alloy