Press tube fittings, also called crimp fittings, use a time-saving crimping technique to connect tubing without soldering, flames, or gas. These fittings have an O-ring that slides over tubing (wet or dry). A crimping tool presses or crimps the fitting in seconds. Crimping is secure and creates a permanent connection. Press tube fittings are available in copper and bronze, stainless steel, and steel for use with a variety of tubing and applications.