Pre-Filter Air Intake 9.5 Inch Length 9.5 x 6 Inch Top 9.5 x 6 Inch Base Oval 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 61503 Filter Base 9. 5 x 6. 0 Inch Filter Top 9. 5 x