Dear Sir/Madam,This is nguyen huuquang from VN.I'm looking for products with the following specifications:Dear manufacture/ authorize supplier! I'd like to buyIndustrial type, OZONE GENERATOR 8g/h (or 4g/h x 2pcs) for purifying fresh air Quality must be tested by international orgernization with Certification : RoHS, CE ....Looking for your quotation and catalog of product soon!Thank you!refer technical dataRated Flow 4 LPM (8.48 SCFH) Concentration at Rated Flow 3%Standard Operating Pressure 0.0 to 5 PSI (0.0 to 0.35 Bar)Max Operating Pressure 5 PSI (0.35 Bar) Supply Gas Dry Air or OxygenAdjustable Ozone Output Dial YesCooling Air CooledCorona Cell Materials Stainless Steel with Glass/Quarts DielectricFlowmeter YesFlowmeter: No needle valve on the flow meterPressure Gauge NoOperating Frequency Medium Frequency 100 - 2,000 HzOzone/Oxygen Connections 1/8-inch Female NPT connections - 1/4-inch barb fittings are providedOzone Output 8 grams/hour (8,000 mg/hour) Electrical 120 VAC 60 Hz 105 watts ( or 220v ) Show More