Graded Density Filter Cartridge 5 Microns Filter Media Dual Gradient Polypropylene Height 20 In. Outside Dia 4-1/2 In. Flow Rate 35 gpm Max Temp 145 Degrees F Reduces Sediment Application Sediment Reduction Inside Dia 1 In. DGD Series For Use With 20 in Big Blue Housings Standards NSF 42