Pressure control valve for CO2 aquarium plant fertilization systems, pressure reducer for reducing the bottle pressure from 60 bar to 1.5 bar working pressure for controllable CO2 supply Suitable for CO2 disposable and reusable bottles, remove the knurled nut (W21.8 x 1/14) for compatibility with disposable bottles M10 x 1 With pressure gauges for working and bottle pressure, high-quality design made of anodized aluminum, precise CNC milling, reliable sealing washer instead of O-ring Simple attachment by screwing the pressure reducer onto the CO2 pressurized gas cylinder, regulating the amount of CO2 on the fine needle valve Scope of delivery: 1x JBL pressure control valve for CO2 fertilization systems, JBL PROFLORA CO2 REGULATOR ADVANCED, with 2 pressure gauges, for reusable and disposable bottles (with adapter), Art. 6467100