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The Radium Engineering 18-0042 air filter is commonly used for venting engine crankcase vapors, fuel cells, etc. It is compatible with a 3/4" (19mm) barbed nipple. 
Legal in California for off-road use only.
SPECIFICATIONS
Style: Straight Cylinder
Media: Non-Woven Synthetic
Media Color: Green Dye
Pre-Oiled and Washable: Yes
Inner Diameter: 0.75in (19mm)
Outer Diameter Bottom: 2.2in
Outer Diameter Top: 2.0in
Filter Height: 2.4in (total)
Filter Inlet: Polyurethane
End Caps: Stainless Steel
Radium Logo: Embossed
Finish: Black Zinc-Plate
Clamp: Stainless Steel
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