This 3/4" Barbed Ebb & Flow Bulkhead Fitting is great for do-it-yourselfers. Fits one and three-eighths inch (1 3/8”) hole. It is barbed on one side to fit standard 3/4" flexible tubing, including our Sunleaves flexible black tubing, and it is threaded (female) on the other end to accept 3/4" male threaded screens and couplers. Our 3/4 inch threaded inlet screen is a perfect fit and offers an extremely affordable solution for many needs.