This aluminum marine bunk bed is for vessels,ships,boat use,it is a marine furnitures. This showed our raw material is aluminum,light weight.It is will be powdercoating to cover the aluminum.It is will be anti rust,light weight.That's will be very good for vessels using.It is made by SANYON ,welcome contact us! [email protected] Or vist our website www.marinefurnitures.com ！ Thanks for watching our marine aluminum bed videos!