Combining the Model 20 HT/GT mixer with the RL-3 impeller from Chemineer creates a mixer for anoxic, aeration, sludge and digester basin applications that contain fibrous material. The ragless impeller prevents fibrous material buildup on the rotating impeller of the agitator. The mixer’s modular design package enables reduced replacement parts inventory. 800/643-0641; www.chemineer.com.