The Amerex 807 Heavy Duty Vehicle Bracket is designed to work with most 5 lb. portable fire extinguishers in a variety of vehicle applications. Amerex fire extinguisher brackets are quality manufactured of steel with a primed and powder coated paint finish. The paint finish assures many years of use and meets the latest Ul salt spray requirements (240 hrs. 20% salt solution – Astm B117).Featuresdot Approved when used with the following Amerex extinguishers:Fits Amerex Models: B355T, B386T, B402, B409T, B424, B453, B479, B424, B500Holds extinguishers with a cylinder diameter of 4.25". Also works with other fire extinguishers with the same cylinder diameter.Bracket Dimensions: 6.75" W x 5.125" D x 10.375" HBracket Mounting Holes: 7/16" dia.