OdorGuard pleated filters use CarbonWeb filter media and are Class 2 approved by Underwriters Laboratories. The medium-duty filters have an integrated pre-filter and are offered with granular carbon loadings of 200 grams per square foot of filter area in a 2-inch thickness, and 100 grams per square foot of filter area in one-inch thickness. Light-duty filters are offered with granular carbon loadings of 50 or 25 grams per square foot of filter area. All OdorGuards offer low resistance and maximum adsorption properties since no adhesives are used.

D-Mark Inc., 25712 D'Hondt Court, Chesterfield Township, MI 48051-2600; (586) 949-3610; fax (586) 949-4181.

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• D-Mark Inc.