1.The inner tank is made of SUS--304 food grade stainless steeel.

2.The external shell is made of pearly golden stainless steel.

3.The insulating layer use polyurethane bubble.

4.The fasteners are stainless steel screws.

5.The vacuum tube is made of high brosolicate glass.

specification:  Dia:47mm  Length : 1500

                     Dia :58mm  Length :1800

water capacity :97.5L--350L

Pressure :0.15MPa

Heat preservation :72hour

Hail resistance :25mm