TOP 12-Outlet Drip Emitter. 3.3 GPH per outlet. The TOP concept is designed for first time installations or retrofitting an existing sprinkler riser into an efficient 12-Outlet drip irrigation system. The TOP concept utilizes unique self cleaning, pressure compensating emitters enabling long runs with even water distribution from all outlets. Color-coded converter barbs, end plugs, caps, stakes and micro tubing sold separately. OR you can purchase TOP-100 or TOP-300 kits that include the accessories previously listed.