Pup joint made of high strength steel, with a special toughening process. It uses Acme threaded connection, making it with the demolition convenient, fast, reliable connection, and reliable. Multiple seal design and high precision, to ensure the sealing performance of Pup joint. Features:- 1. The integral pup joint is union instead of screw connection on the top, which is more secure and reliable. 2. Easy and quick assembling and disassembling. 3. High strength and low weight. 4. Each technical parameters and performances of pup joints conform to standards of API Spec 6A and can be exchanged with like products internationally.