The Joma external rear slot post box is a lockable box with a mail slot on rear of box. The Joma post box is ideal for fitting on back of doors or gates with an external mail slot to collect mail. The box comes with the fittings included. The size of the post box is 350 x 300 x 90mm (Mail Slot - 260 x 40mm). The box comes in a black finish. easylocks are the UKs main suppliers for Joma external rear slot post boxes.