Stauff SPAL 4020 PP DPAL AS M W4 Bewakingsmodules Replacement Filter Element for Return Line blank filter Element Replacement Filter Element for Return Line Filters Micron Rating: 20 µm Material: Filter Paper Outer Diameter (mm): 128 Inner Diameter (mm): 91 Equal Elbow Size Type: 38S Fitting Body only Steel Hex Head Bolt Weld Plate Clamp Assemblies Heavy Series Size 4S Ø20mm Polypropylene W4 Cover Plate