Orange Letterman I designer free-standing letterbox with porthole and post If you want to know whether the post has arrived, all you have to do is look through the porthole in the Letterman I free-standing letterbox. The practical letterbox not only impresses with its high-quality materials, but also with its excellent workmanship. This free-standing letterbox is made of stainless steel and has an orange powder coating. The glass porthole is framed with a stainless steel ring. In addition to normal sized letters, C4 envelopes can also be inserted without being folded, as the opening is 32.5 cm x 3.5 cm. In the meantime, the Letterman I free-standing letterbox has become a bestseller all over the world.