FI RST 12LM DK B W3 MS Stauff Clamp Assembly Heavy Series Size blank filter Element Clamp Assembly Heavy Series Size 3S Ø16mm Aluminium W12 Weld Plate Cover Plate 24° Weld Cone Reducer OD Tube1 2 Whall Thickness: 38 25x5 Steel External Metallic Sealing Ring with Cutting Ring & Union Nut Steel Zinc Nickel Plated