Have this Pyramid Wood Post Cap delivered to your job site. Post caps add a finishing touch to deck and fence posts. Post cap can also decorate a mailbox post. Post cap protects top of wood post from sun, rain and snow. Pressure treated wood resists decay and termites. Post cap fits a standard 4 in. x 4 in. wood post (Actual size 3.5 in. x 3.5 in.). Exterior dimensions are 5.5 in. x 5.5 in.