DE504. size:17,18,19inch American-style 17-inch and 19-inch, European-style 18-inch and 19-inch product weight of 3.5 KG. This product waterproof surface high professional export to European and American countries, the hinge can choose plastic, zinc alloy, copper, stainless steel, 4 vivid three-dimensional surface patterns and designs, more than 100professional designs available for your choice.