Meet requirements of imo, solas Light opening and easy operationpassed fire test Application: used for bulkheads or combination of bulkhead and ceramic cotton with fireproof requirements Stuffing: fireproof material Option: hose-port/window Material: steel Available certificates: gl, dnv, ccs, bv, abs, lr, kr, rs, etc. Available in natural finish, primed or coated in accordance with client request. Sizes and colors will customize according to your requirements. Contact us for more information. Plywood cases, pallets, etc.