This 14-piece tee fittings adapter connector set is designed for use with hydraulic pressure gauge test diagnostic tools.Included sizes: 3/8 inch female, 3/8 inch male, M18x1.5 female, M18x1.5 male, M16x1.5 female, M16x1.5 male, 7/16 inch female, 1/4 inch female, 1/4 inch male, M14x1.5, M14x1.5 female, 11/16 inch, 9/16 inch female, and 9/16 inch connectors.Compatible with standard hydraulic pressure gauge test kits and automotive diagnostic applications.