Model: AA-H1976 Product Dimension. Length: 20 1/16 “; Outer Dimension: 7″; Top: 3″ Open; Bottom: 3″ Open. Specifications: Filtration Area: 80 Sq. 100% American Made and Sourced. Great Seal: We use soft plastisol end caps to allow for a better seal on top and bottom, this will reduce water bypass and ensure your filter works as effectively as possible. COMPATIBLE REPLACEMENT PART NUMBERS. All American Cartridge is an independent brand.