From The Anvil Polished Brass 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.
Designed to match our other polished brass front door furniture to create a feature entrance door.
Maximum door thickness: 72mm.
Minimum door thickness: 42mm.
Supplied with matching SS bolt through fixings.
Made from solid unlacquered brass
this finish is both classic and simplistic and offers great possibilities for stately and period dwellings alike
particularly where a very traditional look is desired. When fully polished this finish has a depth of reflection. However
as the product is unlacquered this can also be left to age naturally
which over time will create a beautifully historic finish.