Nylon construction; NPT Fitting, Universal, Push-On Hose Fitting, PTC T-Fitting 1/4" O.D., 1/4" O.D. x 1/4" O.D. x 1/4" O.D. push-to-connect tubing connector., PTC T-Fitting 1/4" O.D., 1/4" O.D. x 1/4" O.D. x 1/4" O.D. push-to-connect tubing connector, PTC Fitting.