The one with the stainless steel porthole - comfortable Letterman I mailbox in an outstanding design Letterman I is an extremely practical designer letterbox that impresses with its outstanding quality of workmanship and has become a worldwide bestseller. Its figurehead is the striking stainless steel porthole. With a length of 32.5 cm and a height of 3.5 cm, the insertion opening is dimensioned in such a way that even C4 envelopes can be inserted without bending. The Letterman I mailbox complies with the DIN 32617 mailbox standard recommended by Deutsche Post.