Dynamic Venturi Injector� Constructed of an ozone/chemical resistant polymer, it has two ports with an internal 360� orifice mixing chamber which provides complete dynamic mixing. Each 1/4" port has a built in ozone resistant check valve built into it. Performance Specifications: 1 PSI: 1 CFH 2 PSI: 2 CFH 3 PSI: 3 CFH 8 PSI: 5 CFH Specs: Manufacturer - Prozone-Water-Products Ozonator Part Type - Injector, 3/4"b Replaces: 2228-01 , 600002