... specification: 47 x 1,500, 58 x 1,800, and 70 x 2,000mm Amount of vacuum tube: 16, ... 18, 20, 24, 30, and 36 Outer tank material: imported color armor plate 0.4mm ... 50 to 60mm polyurethane foam Suitable installing on both flat roof and slope roof More styles or special model based on ... the requiements of customer is available.For details and more products, please visit our website..