This 43" high GuardRail corner post is constructed from 4" square x 1/4" wall structural steel tubing with metal cap, and a 9" square x 1/2" thick steel base plate. The posts are designed to be used in combination with double stacking our heavy-duty guard rail solutions (sold separately in increments from 1’ 8” to 9’ 8”) to create a fast and easy-to-install taller safety barrier capable of withstanding a 10,000 load moving at 4 miles per hour. The base plates have four 7/8" round anchor holes, and the floor anchors are provided. All posts, rails, and optional doors are USA-made and are powder coat painted safety yellow for visual clarity. GuardRail components bolt together quickly and post base plates are to be securely anchored to the floor with provided hardware. All necessary hardware is included in each order combining your rail, posts, and optional doors.