Use this barbed fitting with our 1/2" ID Silicone tubing for a better fit. Because Silicone tubing is soft and flexible it actually fits much better on this over sized 5/8" OD barb than on a 1/2" OD barb.,,Designed and made by MoreBeer! to maximize flow this fitting is also perfect for use when a March or Chugger High-Flow pump as it allows a larger volume of wort to enter the pump, decreasing instances of cavitation.