Dixon® Pneumatic Coupler, Automatic, Series: DF Industrial Interchange, Fitting/Connector Type: Coupling, 1/2 in Nominal, Coupler x Barb End Style, 1-1/16 in Hex, 3.51 in Length, 500 psi Pressure, -40 to 250°F, Brass, 1.34 in OD, Domestic Dixon® 4DS4-B DF Industrial Interchange Automatic Pneumatic Coupler, 1/2 in Nominal, Coupler x Barb End Style, Brass, Domestic