Since 1980, on basis of know-how related to recondition works for longtime, JONGHAP Polestar(JHP) started to product new valve spindle and seat/bottom piece for 2 & 4 stroke marine diesel engine from Feb in 2017. JHP is studying how to ensure ship safe operation through analysis, test and inspection for our products with KIMS(Korea Institute of Materials Science) for continuous technical development. If you want to purchase JHP products, please inform to us your requirements like product order option. JHP will do our best to satisfy your needs.