The UK s most popular style of letter plate. Now available in Grade 316 Stainless Steel which offers exceptional anti corrosion value and provides excellent protection against the elements. Suitable for external coastal environment and comes with an additional gasket to prevent water ingress. Plated stainless steel spring, concealed cap and inner bolts. Works with our existing letter tidy range AA52 and AA56 . The sprung inward opening flap automatically closes once the package has passed through the aperture. The well defined edges and plain design makes for easy cleaning. Comes with a 10 year mechanical guarantee. Suitable for residential and commercial use.