Marine windows are made of aluminum, steel, brass or mixture of them used for sea-going ship and warship and also inland ship. There will be a porthole window, rectangular window, trapezoidal window, sliding window, heated window. YSmarines is one of the leading manufactures in china for marine products and can supply a wide variety of marine windows with modest prices. All windows have the certificate of CCS, BV, ABS, DNV-GL, LR, KR, NK, etc.
https://www.ysmarines.com/products/collections/marine-window.html
