Metroplan shield sunken post aluminium frame exterior showcases metroplan sces8al these weatherproof showcases from metroplan are supplied on 2 heavy duty steel posts which can be concreted into the ground these noticeboards have an aluminium frame and a powder coated steel backing plate which gives extra weatherproofing and security they are available with a range of exterior cloth colours metroplan shieldsunken post exterior showcases 1050x752mm aluminium frame