The POWERS Controls Pneumatic Tube Fitting Kit providers the service or installation mechanic with a compact and convenient source of the most commonly used brass barbed fillings for 1/4-inch, 3/8-inch, and 1/2-inch O.D. plastic tubing. This kit is useful for servicing, modifying or adding to pneumatic control systems. Purchasing in quantity reduces material costs, but labor savings is the major reason to have this convenient kit in you service shop of van.