Contract size is 29,000 gallons (one railcar).  Deliverable grades Denatured Fuel Ethanol ASTM D4806.  Contract months are all calendar months.  Daily price limits are $0.30 per gallon, no limit in the spot month.  Final settlement procedure is by physical delivery.  Refer to the following for full specifications:http://www.cmegroup.com/trading/energy/ethanol/cbot-ethanol_contract_specifications.html