Specifications:

41/2″, 5″,51/2″,7″,95/8″,103/4″,133/8″, 135/8″,16″,20″,ect.Design and manufacture according to the user’s request.
Thread: STC/LTC/BTC/FOX/TP-CQ/TP-NF/TP-FJ/WSP -1T（2T、3T、4T）,etc.