From The Anvil Satin Marine SS (316) Traditional Letterbox

Description

For composite and upvc doors we would recommend using our door letterbox which is supplied as a full kit and contains a tunnel and brushes to reduce drafts and insulate the door. The sleeve inside the letterbox also protects the door from moisture and masks the aperture cutting.
Our Satin Marine Stainless Steel is grade 316 and manufactured with high concentrations of chromium and nickel. These products offer great strength and have extremely resilient corrosion resistant properties which make them an excellent choice for coastal locations. This finish is low sheen and offers a frosted, matt look. For complementary products, we recommend our Satin Chrome finish.