... ,ISO,Solar Keymark certification .easily to install. high quality Detailed Product ... for this product, diameter from 400 to 520 mm, depth from 4 to 6 cm, thickness from 0.31 to ... 0.5 mm, material available including stainless steel, galvanized steel, color steel and plastic, and any ... is reasonable.4.Easy to install and practical.5.Suitable for many markets. Galvanized ...