Stauff RE 130 S 50 B 2 Schottenpompen Hexagon Lock Nut Size blank filter Element Hexagon Lock Nut Size Type: 42L 38S Steel Replacement Filter Element for Return Line Filters Micron Rating: 50 µm Material: Stainless Mesh Outer Diameter (mm): 60 Inner Diameter (mm): 34 5 Length (mm): 276 Sealing: NBR β ratio >2