HOGA INDUSTRY CO., LTD.”Engine Valve” material used in SUH3, SUH35, NCF 751 etc… The specification of these material meets O.E.M. standard & are selected by the world leading Automobile, Motorcycles makers. These materials offer properties of anti-wear, anti-corrosion, heat-resistance and stable composition at high working temperature. ”Valve Guide” made by material of FC 25, Hardness achieve HRB 92~102; The making of I/D processing from German technology, no burr processing, fine-surface finished, and high surface hardness , to reduce the wear of Engine Valve. The anti-wear performance of valve guide is double effective than a traditional processing. The forming of “Valve Seat Insert” finished by CNC machining process, to produce a nice quality & high precession parts. In order to meet & satisfy our worldwide customer. We do customization service on any dimension & necessary treatment if required.