X-Treme Duty Stanchion, Application Outdoor or Indoor, Post Dia. 3 in, Height 46 1/2 in, Color Black and Yellow, Post Material UV Inhibited Polyethylene, Base Dia. 21 in, Base Material High Density Polyethylene, Post Finish Matte, Finish Matte, Base Type 2 gal Water Bladder for Ballast, For Use With Mfr. No. 50002-100, Includes Base Containing A 2 gal Water Bladder for Ballast, Pole and Top, Wheels on The Base for Portability, Fillable Yes, 1 Pair