This 14-piece tee fittings adapter connector set is designed for use with hydraulic pressure gauge testing and diagnostic tools in automotive applications.The set includes the following connectors: 3/8" Female (1), 3/8" Male (1), M18x1.5 Female (1), M18x1.5 Male (1), M16x1.5 Female (1), M16x1.5 Male (1), 7/16" Female (1), 1/4" Female (1), 1/4" Male (1), M14x1.5 (1), M14x1.5 Female (1), 11/16" (1), 9/16" Female (1), and 9/16" (1).