... ,N80,L80,P110 2.OD: 2-7/8"to 13-3/8" 3.Standard: API 5CT 4.Place of Origin: China API ... -1/2”, Casing coupling from 4-1/2” to 13-3/8”TYPE: NUE, EUE (tubing coupling), STC, LC, BTC (casing coupling ... .88*269.8823.1610-3/4”STC298.45*203.2020.7810-3/4”BTC298.45*269.8825.7411-3/4”STC323.85*203 ... .2022.6411-3/4”BTC323.85*269 ...