... Standard: API 5CT Grade: J55, K55, L80, N80 Connection Type: LTC, STC, BTC Size Destination: 4 1/2'' Petroleum OIL TUBINGapi ... 5ct casing pipeStandard: API 5CTGrade: J55, K55, L80, N80Connection Type: LTC, STC, BTCSize Destination: 4 1/2''-20''Wall thickness:5 ... oil or gas from wells.5 Thread and socket:BTC, LTC, STC, EUE ect6 Packing: in bundle, non wonven cloth, API ...