Jain Irrigation-Aquarius 71591207 17mm x 500' Total CV Emitterline with 12" Spacing 0.53 GPH - The Total CV Emitterline features Amnon Emitter Technology. Patented Cascade Labyrinth Technology reduces the potential of clogging while the physical root barrier prevents roots and debris from entering the line. The hydrodynamic emitter design ensures continuous flushing of sediments and small dirt particles. Silicone diaphragm (molded - not cut).