Vacuum tube especs: 58x1.8m Vacuum tube amount: 16/18/20/24/30 The material of the inner tank: 0.5mm imports 304 food and one grade of stainless steel board. Heat preserviation: 60mm polyurethane foam. The material of the cover tank: Whether American flash aluminium boardnot silver of Fluorine carbon. Support material: Resist and incline and knock into the heater-otypic material of galvalume steel. Design idea: home hot water center if you have interest in our products, please send your requirement and email Address to us by fax (our fax machine is auto-receive style).My skypeID: cactus398. brcker45709.

Flat Panel Series Solar Water Heater product offered by Shenzhen LONGDI MICRO MOTOR SHENZHEN CO.,LTD