SMC KQ2E07-00A Brass Push-to-Connect Tube Fitting, Bulkhead Union, 1/4" Tube OD Bulkhead union to connect two tubes through a panel Push-to-connect inch tube connections on both ends Brass body and threads for resistance to corrosion Operating pressure range of -14.5 to 145 psi (-100 kPa to 1 MPa) Operating temperature ranges of 23 to 140 degrees F (-5 to 60 degrees C) (ambient) and 32 to 104 degrees F (0 to 40 degrees C) (fluid) This product is not intended for use in potable water systems