API Casing Tube 1.Grade: J55,K55,N80,P110 3.Thread: BTC,LTC,STC 4.Standard: API 5CT 5.Place of Origin: China ... ,N-80,C-75,L-80,C-90,C-95,P-110,Q-125,Type of End-finish: Plain, BTC, LTC ... , C-75, L-80, C-90, C-95, P-110, Q-125OD: from 4 -1/2" to 20”Wall Thickness: 0.205 ...