Radial Seal Outer Air Element Notes: Inside-Out Flow Direction Contains: 3 3/4 In. Dust Ejector Hole Fits: Freightliner, Kenworth, Peterbilt, Western Star Trucks Replaces: Donaldson P534816 O.D.: 11 3/8 (288.9) I.D.: 6 13/16 (173.0) One End Length: 23 13/16 (604.8) F. Gskt.: G501-AF