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