Inquiry (采购产品): experiment we are working on some patent which will require of numerous units of carbon dioxide gas cilinders. my main questions are: a)if the cylinder has to be only round or you can produce it flat b)becuase we need to save on weight, can the cylinder be made out of plastic. c)how big does it have to be in order to be able to push a 20 lb. if the solution is positive we can discuss the cost. thanks for the trouble. josh barazini **** Hidden Message ***** josh barazini 90805 Company: aya E-mail: ayajosh@012.net.il **** Hidden Message ***** ayajosh@012.net.il