Image Wilkerson FRLs F28-Series Standard Airline Filter Markets Food & Beverage / Pharmaceutical, Steel Processing, Transportation Jump to Section Product Options Resources Related Products Product Options Part Number FRL Size F28-03A Standard F28-04A Standard F28-06A Standard F28-03M Standard F28-04M Standard F28-06M Standard F28-03AMB Standard F28-04AMB Standard F28-06AMB Standard F28-03MMB Standard F28-04MMB Standard F28-06MMB Standard Resources Image Learning Video What is a Micron? Related Products Image Wilkerson FRLs B28-Series Standard Filter/Regulator Image Wilkerson FRLs C28-Series Standard Combination Unit Image Wilkerson FRLs M28-Series Standard Modular Coalescing Filter Image Wilkerson FRLs R28 Standard Regulator