The Weatherables Stanford aluminum post kit with a flange is engineered for strength and durability. The 38 in. tall posts are typically used with the 36 in. (CWR-B36-A6, CWR-B36-A8) tall Stanford aluminum railing kits. The 2.5 in. square posts has 2-decorative grooves on each side of the post. The decorative grooves show architectural depth to the post, but also serve as self-centering guides when installing the Stanford Aluminum railing kit. This makes screwing the brackets to the post much easier. The long lasting, textured white powder coated finish eliminates the need for maintenance. The Stanford aluminum post is 0.100 in. thick and can be installed directly on concrete or on your deck. Required fasteners (depending on your method of installation) sold separately.