Shop Vac 903-04-00 Cartridge Filter for Wet or Dry Pickup Generic Replacement. Use for both wet and dry pick-up and fits most Shop-Vac wet/dry Vacs {Note: NOT for large quantity wet pickup such as standing water}(7-3/16" Outside Diam - 5-5/8" I.D. x 6-5/8" Tall) Enclosed Metal Bottom. (will not fit 1x1 , BullDog Portable, Mighty Mini , Hippo , Hang Up Vacs or AllAround Series with 1 1/2 or 2 gallon tank, 5 gallon contractor portable, heavy duty portable, floormaster plus, all around plus) Sug Retail 17.99