The Handy Post Sleeve only (mailbox not included) is constructed of maintenance-free and durable PVC (Vinyl) and comes with a Lifetime Warranty against peeling, flaking, blistering, corroding, rotting, abnormal discoloration and manufacturing defects. You will never have to paint your mailbox post again. It is designed to fit (sleeve) over an existing or new wood 4x4" (actual 3.5"x3.5") post which is exactly 42" above the ground. If your current mailbox is secured to any type of wood 4x4 configuration, you can modify it by cutting it to a straight up 42" (MUST BE 42") to accept The Handy Post Sleeve. The reason for the 42" wood height is so that when installing your mailbox mounting plate, there will be something for your screws to engage. This post setup will accommodate a single mailbox of any size and support up to 100 lbs. This aesthetically pleasing, economical product will enhance any home, business or neighborhood property. The Handy Post Sleeve will add character to any setting. Conveniently packaged with installation instructions included