Heavy Duty Vehicle Brackets with Adjustable StrapsAmerex 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 U/L salt spray requirements.Available in 3 sizes :  Small for 2.5 - 5 lb ABC, Medium for 10 lb Dry Chem.  and Large for 20 Lb Fire Extinguishers.