Image Wilkerson FRLs D28-Series Combination Unit Markets Food & Beverage / Pharmaceutical, Steel Processing, Transportation Jump to Section Product Options Related Products Product Options Part Number Size D28-04MMB 1/2" D28-06MMB 3/4" Related Products Image Wilkerson FRLs C31-Series Jumbo Combination Unit Image Wilkerson FRLs F30-Series Jumbo Airline Filter Image Wilkerson FRLs L40 & L50-Series EconOmist® Standard Lubricator Image Wilkerson FRLs M30-Series Jumbo Coalescing Filter