Materials: Brass - Stainless Steel Filter Ø 1 Holes - Tungsten Carbide Nozzle Ø 1, 5. Use: The Combined Action Of The Nozzle And Venturi, Agitates A Large Volume Of Liquid And Keeps The Chemical In Suspension. The Filter And The Nozzle Can Be Inspected From The Outside. For Tanks With Central Tunnel 2 Hydraulic Mixers Are Required.