The Chevron Pneumatic Tubing 1063589 is a durable 1/4-inch black tubing supplied in a 250-ft roll, designed for reliable air flow in pneumatic control systems. Commonly used in HVAC applications, it connects thermostats, controllers, and actuators to ensure efficient air signal transmission. https://www.partshnc.com/1063589-chevron-pneumatic-tubing-14-tubingblack250ft