HF-004 Ceiling overhaul Hatch 1)Material:Aluminum alloy for the core,iron for the outer frame. 2)Color:White powder-coating finish or no painting for choice,or color you are prefer 3)Snap style Ceiling overhaul Hatch are convenient for opening and for the ceiling overhaul. 4)OEM is available. Outer standard Size: As per your request(Neck size+54mm) Height:50mm Neck size: A*B(size is as per your request) Order Notes: Item-neck size A?-color