Features: This filter is designed to trap your solvents and oils while cleaning, includes holding spring for installation(Spring Makes the filter work stable,better than other filter without that) End cap (OD) thread can interchange with napa4003,wix24003 fuel filter 1/2"-28 thread on one end,Smooth 1/2" bore on opposite end, Aggressive knurls (texture) on end caps for easy removal and inspection of fuel filter 9 3/4" long overall,1.9" OD and approx.1.75" ID Condition: 100% New and High Quality Material:Aluminum,Hard Coat anodized Manufacturer Part Number: WIX 24003 Other Part Number: NAPA 4003 Package Include: 1x Turbo Air Filter (includes an 4004 filter cartridge element and holding spring for installation)