Main Category : Rotary Mailbox Enclosures - USPS Approved & For Private Use/Access Rotary Mailbox Enclosure H101R Rotary Mailbox Enclosure - For Aluminum style mailboxes. Rear Loading. Unit Size: 30"W x 24"D x 74"H. Mailboxes sold seperately. Q 1-2 $889.50' +3 Call