Filtex Vacuum Bags 12 Gallon. Fits 12 gallon Unit (21" long x 13 1/2" Diam) Aftermarket Replacement. Replaces all Filtex bags 18 inches long and longer. bags may also fit other Filtex and Air-vac vacuum units: FX Series 400, 500, 500A, 675, 675A, 725, 775, 800, 900, 1000, 1100, 2000, 3000, 4000, 5000. NT Series C600, M285, S300, SP700, SB200L, TC600L, TM285L, TS300L, TSP300L, TSP700L. ZX Series 5800, 7000, 8000. Also may fit the M & S, Air-vac Blue and Gold Series units. Will Not Fit BV200 Series. Replaces 722L, MS VM502, S-310. Buy 5 or more and receive Free Shipping!