The Bucket Company's 1/4" Vinyl End Caps work with 3/4" Barb - 1/4" Barb Reducer Connector Fitting, designed for the irrigation assembly on the 1 Gallon and 3 Gallon Drip Kits. These End Caps allow cultivators to close any unused 1/4" ports when assembling, so pressure is maintained with no water leaks!