The Handy Post 2 sleeve (mailboxes not included) is constructed of maintenance-free and durable PVC (Vinyl) and comes with a Lifetime Warranty against peeling, flaking, blistering, corroding, rotting and manufacturing defects. It is designed to fit over an existing or new wood 4x4 (actual 3.5"x3.5") post, or can fit over many no-dig supports of similar dimensions. If your mailboxes are secured to any type of wood 4x4 configuration, you can modify it by cutting it to a straight up 42" height or less to accept The Handy Post 2. The Handy Post 2 is designed to accommodate two S,M,L,XL mailboxes (not to exceed 12" wide each). The cross arm is 26" across and 5" wide and will accommodate up to 100lbs. This aesthetically pleasing, economical product will enhance any home, business or neighborhood property. The Handy Post 2 will add character to any setting. Conveniently packaged with stainless steel hardware and installation instructions included.