The Brass Slip-Lock Elbow works with 3/8 inch nylon mist tubing and connects in seconds with a simple insert and twist motion. Use to assemble or repair your outdoor mist cooling system. The unique brass Slip-Lock design can be used with both low and high pressure (up to 160 PSI) systems as the elbow actually grips tighter when the pressure increases. Additionally, the elbow and tubing can be disassembled by simply compressing the ferule against the body and pulling away from the tubing making the Slip-Lock elbow a versatile mist system fitting.