NOTE： we don't ship the item to PO BOX address， and we only ship the item to English address, so please leave us your physical English address when you pay.If your country is not listed in our shipping policy, pls tell us your city and zip code, we will check whether your city belong to remote area or not, then tell you the accurate freight.Tks for your understanding and coopearation cription: 1.Electrodes: Use enamel coating as internal electrode, stainless steel as external electrode, capacity of corona resistance and machinery anti-force capacity are stronger than glass, ceramic material. Uniformity air gap between enamel coating internal electrode and stainless stee l external electrode, it produces high concentration ozone output. It uses insulation materials for connections, for preventing creepage.    2.Cooling way:  Water cooled for internal & external electrodes, effective prevent high temperature rising when the tube is discharging, for ensuring high ozone concentration output.    3.Adjustable ozone output: 20-100%. Use high-frequency & Intelligent power supply inverse system, ozone output can be changed on demand to achieve accuracy control.   4.High ozone concentration & output   Specifications: Item Unit CH-PC18G CH-PC30G CH-PC40G CH-PC60G CH-PC80G Ambient temperature ℃ 23 23 23.9 23.9 24 Ambient humidity % 38 38 37 Oxygen flow rate LPM 1~4 2~8 3~10 5~17 8~20 Ozone concentration Mg/L 112~78 123~72 123~70 120-72 118-74 Ozone output G/Hr 6.7-18.7 14.8~34.6 22.1-42 36-73 56-88 Power Kw ≤0.22 ≤0.3 ≤0.4 ≤0.6 ≤0.8 Cooling method Water cooling for internal & external electrodes Cooling water flow rate LPM ≥2 Cooling water temperature ℃ ambient temperature ± 8℃ Diameter of gas inlet/outlet mm 1.Air inlet & ozone outlet: EDφ8mm                                                    Diameter of water inlet/outlet EDφ10mm Adjustable range % 20-100 Power supply V/Hz 110/220V  60/50HZ Fuse A 3 5 10 Ozone tube dimension mm 285*160*125 340*160*125 460*160*125 600*160*125 705*160*125 Power supply dimension mm 212*90*95 189*146*95 210*146*62 Ozone tube weight Kg 2.5 3 3.6 4.9 5.45 Power supply weight Kg 1 2.4   Working conditions:Ambient temperature: 20℃, Oxygen concentration: >99%, Dew point: >-45℃.   Note: The price is for CH-PC-18G.     Shipping Policy We will send out the item within 2-3 days through DHL/EMS/FEDEX /UPS/SPEEDPAK/CHINA POST to the below countries: Belgium, Netherlands, Luxembourg, Italy, Germany, France, United Kingdom, San Marino; Austria ,Denmark ,Finland ,Greece ,Ireland ,GUERNSEY ,JERSEY ,Norway , Portugal , spain , Sweden , Switzerland; Bulgaria,Cyprus,Estonia,Latvia,Lithuania,Malta,slovakia,slovenia; Czech Republic, Hungary, Poland, Romania,. Australia ,New Zealand ,Korea South, Malaysia, Thailand, Philippines ,Singapore , Bruniei ,Taiwan , Macau, Indonesia, USA, Canada We will send tracking number to your eBay email within 1 day after sending out your item We will mark the item at the very low value, so that you do not need to pay for the tax or pay a little tax. Payment policy: We accept Paypal only. Payments must be finished within 5 working days after bid, otherwise, Unpaid Item dispute will be reported to eBay. Refund &Return policy: We take all the responsibility during delivery. If you do not receive your item, we will refund you the full money or send you a new item according to your request. We can accept the return item within 60 days after the buyer receives it. Once we receive the return item, then we will refund you full money.