all air cool ozone cellSpcec. Rate: 260,300W Size:190*240*70mm Material: Ceramic board from Gemany 138*188and Raditor The way of cool: All air cool. Ozone output: 40g/hr (when oxygen input), 20g/hr (When air input) Ozone concentration 100-120mg/L(Oxygen input for 0.2-0.4m3/hr) 40mg/L, (Air input for 0.4-0.6m3/hr with dew point temperature for -40°C) Thehigh-quality with long life time: 10-15years Rate:100W Size:180*160*70mm Material: Ceramic board from Gemany 138*188and Raditor The way of cool: All air cool. Ozone output: 20g/hr (when oxygen input) The high-quality with long life time: 10,15years Our technic of this ozone item can be similar to the MITSUBISHI Japan laboratory's. The technic of it is the same with Dell American, but the price of Dell ozone item is more than 10 times than thiers. The material of plastic board 20g/hr 40g/hr is polyfluortetraethylene and 304 polyfluortetraethylene of connection between ozone air and plastic.We use alumina ceramic from Germany CramTec brand or Japan Maruwa brand. The bolts will be 304 stainless steel. So you can check thecost is very high. PVC or PP materialand PETT plastic material can be chosen.