1.Package includes: the portable set includes 2 piece S699 1/4 inch closed ball air chuck and 2 piece S690 1/4 inch fnpt dual head air chuck, this combination is convenient to use S690 Dual head air chuck: with 1/4 inch female national pipe thread, and the maximum air pressure is 150 pounds per square inch, it has the function of checking pressure and , suitable for tires of trucks, motor homes, buses, etc. 2.S699 Closed ball air chuck: with 1/4 inch fnpt air inlet, function is to enable the shutoff valve to shut down the air flow when the stem is not opened, suitable for general commercial and industrial air filling applications 3.Easy to install: when you to use closed ball air chuck or dual head air chuck to work, which just needs to be connected by screw rotation, the dual head air chuck can make tire valves more accessible with the two heads for easier access 4.Sturdy material: the closed ball air chuck and dual head air chuck are made of brass mainly, they have good corrosion resistance and wear resistance, you can use for a long time Colour:Photo Color Material:copper Package Contents: 2 x S699 1/4inch Closed Ball Air Hook 2 x S690 1/4inch Pointed Double End Air Cylinder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.