A favorite of University housing managers, this indoor only solution helps keep your mail area organized. Used for private delivery, there are no minimum or maximum mounting height requirements since they are not constrained by postal installation regulations. The 1700 series has an exposed back for easy distribution access to all mailbox compartments at once, so planning for additional space will be necessary to accommodate a secure room behind the mailbox installation. Please note: This product is suitable for private deliery only.