The Bucket Company's 3/4" Vinyl End Caps work with all of the Barb Fittings we design and manufacture. These End Caps allow cultivators to close any unused 3/4" ports when assembling so water pressure is maintained with no water leaks! Compatible with the Ez-Pz Buckets, High Performance Cultivation Systems, Ez-Pz Runoff Drain Trays, Ez-Pz Runoff Pump Kit, and Ez-Pz Bubbler Manifold Kit.