The Post Base can be used for any F Type CBU size.. Attaches to any F Type CBU roof. 11" H X 32" W X 19" D Post Base From Decorative Collection The Decorative Post Base wraps around the existing post that comes with the CBU and hides the mounting hardware providing a clean, unified look. This is a retrofit item and can be added to any 8 or 12 door F Type CBU at any time. The cast aluminum CBU Roof Cap architectural mailboxes 8504bbp black and bronze pebble decorative cap with ball finial for cluster mailbox is secured directly on top of the CBU. It must be used with the Post Base. Architectural mailboxes 8501sp sandstone pebble decorative base for cluster mailbox 15" H X 8" W X 8" D Decorative Cap with Flat Finial for Cluster Mailbox UnitThe cast aluminum CBU Roof Cap is secured directly to architectural mailboxes 8504bp black pebble decorative cap with ball finial for cluster mailbox the CBU top and comes in a pitched roof design.100% die cast aluminumFits any F Type CBU Cap Ball Finial From Decorative architectural mailboxes 8504sd sandstone decorative cap with ball finial for cluster mailbox Collection The Decorative Cap Ball Finial is designed to sit on top of the roof cap. It is made of 100% die cast aluminum. Post Column From Decorative Collection The Decorative Post column is designed to architectural mailboxes 8503sd sandstone cbu decorative cap with flat finial for cluster mailbox sit on top of the Post Base and is secured to the post that comes with the CBU. No additional parts are required.