Fine Bubble Diffuser (Disc) Coarse Bubble Diffuser (Disc) Fine Bubble Diffuser (Tube) Air Diffuser Air diffuser is a aeration device generally in the shape of a disc, tube, which is used to transfer air and with that oxygen into industrial wastewater.◆ Fine Bubble (Disc): 250mm (10”), 300mm (12”)◆ Coarse Bubble (Disc): 150mm (6”)◆ Fine Bubble (Tube): 600~1000mmApplication: ETP, WTP, STP, Municipal, Fisheries.Brand: TrundeanOrigin: Taiwan, China