According to DWG. 4.225-020.001-Z Materials: - Housing, rotary valves and filter caps: Al - Seals: NBR Connections: - Universal flange of steel - G1 outside - G3 / 4 inside (SAE) for screwing With 2 built-in filter elements (VA / Epoxy) - 25μm nom./60μm abs. With mounted differential pressure indicator type 5.02 - Measuring range up to 2.0 bar - contact f2 at 2.0 bar - Viewing window deltaP f2 (270 °)