Product Name: Valve Seat Inlet Man 52/55A Model NO.: MAN 52/55A Hardness: 38-44HRC Outer Dia. 1: 174mm Outer Dia. 2: 164mm Height: 35mm Seat Angle: 120 Degrees Ignition Mode: Compression-Ignition Number of Cylinders: Multi-Cylinder Machines Cooling Cylinder: Water-Cooled Number of Strokes: Four-Stroke Fuel: Diesel Engine Trademark: TEQRUN Transport Package: Polywood Box Specification: MAN 52/55A Origin: Nanjing China HS Code: 84099910 Product Description Description for MAN 52/55A Valve Seat Inlet:1. Material:heat resistant centrifugal cast iron2. Stress released completely for dimensional stability.3. Seat face concentric to O/D within 0.02mm TIR.4. O/Droundness within 0.01mm.5. Seat face roundness within 0.01mm6. Proven Reliability By European and China Customers.