... Solar Water Heater Solar Water Heater with Galvanized Steel Bracket, Customized Styles are Available.Designed for domestic use. Model No.:JTS004 Key Specifications/Special Features:Vacuum tube ... specification: 47 x 1,500, 58 x 1,800, and 70 x 2 ... ,000mm Amount of vacuum tube: 16, 18, 20, 24, ...