TmallTech 1/4" Flow Restrictor 500CC 5:1 with Quick Connect for RO Reverse Osmosis 150GPD Material : ABS engineering plastics Working pressure:0-0.8Mpa. Come with 2pcs connector(1/4" female thread to 1/4" Quick connect).please add thread sealing tape(PTFE) when fit connector. Suitable for 150GPD. Ratio,pure:waster=1:5.