We do not currently sell a post although is in the works for later this year. It easily mounts to any post with a minimum 2" wide flat surface. Two stainless steel lag bolts and washers are included.

what are the sizes of the small and large mailboxes and does the larger one come in stainless steel? When will you have an appropriate post?

Eve Mannes

Both sizes come in stainless steel and black finishes. The larger size can accommodate magazines and 9x12 envelopes flat while they'll be curled up in the smaller size. Interior mail sizes are 10w x 8h x16d for the large and 7.25w x7h x14d for the small. Posts are now available in silver-gray or black with two choices of stainless caps.