Specification Brand : TheSafetyHouse BulletPoint1 : 2 piece construction BulletPoint2 : Eliminates air bypass BulletPoint3 : Excellent pre-filter for higher efficiency bag and box filters BulletPoint4 : 9 gauge galvanized ring BulletPoint5 : UL Class 2 as to Flammability only ExternallyAssignedProductIdentifier1 : 0710552050230 ExternallyAssignedProductIdentifier2 : 710552050230 ItemName : TheSafetyHouse Secondary Filter Ring Panels 24/case (12" x 12") ItemTypeKeyword : safety-respirator-cartridges-and-filters Manufacturer : NC Filtration ProductDescription : Our Ring Panel filters are moisture resistant and designed for applications with high humidity or varying temperature conditions. ProductSiteLaunchDate : 2017-05-02T18:23:10.031Z Size : 12" x 12" UnspscCode : 40161505