Bollards can be used both indoors and outdoors to protect work areas, racking and personnel. Powder coated safety yellow finish. Molded rubber caps are removable on 4½" and 5½" diameter units. Steel caps are welded on the 1¾" diameter units. Base plate measures 8" x 8", on the 4.5 and 5.5 units (4"x4" on the 1¾" units), and include four (4) pre-drilled mounting holes. Mounting kits and replacement caps available. Welded steel construction.