This Avantco 178CAPTUBE70 capillary tubing is a direct replacement for the one that came with your Avantco refrigeration unit. It helps control the flow of refrigerant in your unit and connects the remote bulb to the thermostatic expansion valve. This capillary tubing features a 0.07" diameter and a 144" length. If your capillary tubing is worn or broken, use this replacement so your unit can get back to operating efficiently.