ll air cool ozone cell (10g/hr, 20g/hr, 30g/hr, 40g/hr) Standard Spcec. Rate:100W Size:180x160x70mm Material: Ceramic board from Japan 138x188 + Raditor The way of cool: All air cool. Ozone output: 20g/hr (when oxygen input) The high-quality with long life time: 10-15years. Now 10g, 20g,30g, 40g/hr all air cool ozone cell with ceramic board can be only made by our company in China . 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 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 the cost is very high. PVC or PP material and PETT plastic material can be chosen. Box packing.