Replacement Air Intake Filter Assembly for Campbell Hausfeld WL026100AV. Nylon Enclosure with Glass Reinforcement for Indoor or Outdoor Use. 1/2" Male NPT thread. Please Note 1/2" MNPT Measures .840 Outisde Thread Diameter in Linear Inches. Enclosure Dimensions 2.13" Height x 2.63" Diameter. Filter Element Included with Integrated Gasket Seal. Can be Mounted Vertically or Horizontally. Rated for Up to 6 SCFM.