Pre-Filter Air Intake 6 Inch Length 2.25 x 8.5 Inch Top 3.75 x 10 Inch BaseConical VolantVolant Pre Filters are factory treated using a proprietary hydrophobic process and are manufactured from the same durable polyester material as their race proven regular style. This unique material contains uniform micron openings that will filter out debris . 005 or larger. This pre filter will prevent splashes of water, mud and sand from saturating your air filter. Details: For Use with Filter PN 5126 Type: Conical Filter Base 2. 25 x 8. 5 Inch