Pricing mentioned is for EA. Requires a minimum buy of 1 piece. Resistance=Chlorine, Hydrogen Chloride, Hydrogen Fluoride, Hydrogen Sulfide, Sulfur Dioxide, Chloride Dioxide; Usage=Chloride Dioxide, Hydrogen Chloride, Hydrogen Fluoride, Hydrogen Sulfide, Protection from atmospheres containing Chlorine, Sulfur Dioxide; Depth=9 in; Height=3 in; Width=4 1/2 in; Type=Filter;