A 24-piece assortment kit of composite (plastic) DOT push-to-connect (PLC) fittings, including straight unions, tee unions, Y unions, and 90-degree elbow unions. Used in truck and trailer pneumatic (air brake) systems, these push-to-connect fittings allow quick, tool-free installation and connection of nylon air lines without threading or clamps, and are commonly used for building or repairing air line routing throughout the vehicle.
