In Front/Out Back
- Perfect for small corridors, narrow walkways or fire exits where space is limited as the unit does not protrude far from the wall (135mm or less). - These units can also be recessed into the wall but are unsuitable for a space where large quantities are needed and surface area is limited. - Because this product is tall and slim there is an automatic preferred limit of three to the number of units that can be comfortably used vertically. As a rule of thumb the top of the top box should not exceed 1750mm from FFL, and the bottom of the bottom box should be no lower than 500mm. The working height then will be 1250mm, therefore a full sized product will only allow 3 units in the height, equalling equivalent to 9 units per m².Visit the Safety Letterbox Company Ltd website for more information on In Front/Out Back