Imperial Post
Systems
Components:
Imperial
post systems feature a decorative post and brace combination with
choice of base and finial styles.
They
are designed for use with standard, Post Office approved rural
mailboxes.

C posts have
2 3/8" Outside Diameter
D posts have 3" Outside Diameter
Base 7-8 and
Finial 7-8 are only available in "D" series posts.