Regular product covering Ø 48.3 - Ø 508 mm type H 40, J 55, K 55, N 80, L 80, C 90, T 95, P 110, Q 125, P 110 etc. Various types of API API cranes and adjusters, each item technical performance indicator Requirement API Spec 5CT "Requirement for lubrication" Requests for product quality and quantity, above product acquisition Okinawa Petroleum Association API 5 CT product certification, domestic use domestic Oilfield use basis Foundation distant foreign countries 10 countries.