Handy Post 54-in x 24-in White Vinyl Mailbox Post Sleeve Mailbox, Sign or Planter Post Sleeve (see all photos) Large newspaper holder or close off with additional cap included Maintenance free and durable PVC with Lifetime Warranty Fits over existing or new wood 4x4 post (actual 3.5"x3.5") or many no-dig supports Accommodates standard and large mailboxes. Meets US Postal requirements