Test Tubing For Sale: We have 450 Joints (USED)  3-1/2″ OD Seamless Tubing 12.95#, USA Manufactured, Grade L-80, Range II,3-1/2″ BTS-6 Connections, Connection OD 4.313 x 2.987 ID. Available for sale. Please contact Rikk Morales at rikk@divrilling.com or call at +971 50 627 8923 to express interest.