Inquiry (采购产品): Medical Oxygen Valves Looking for medical oxygen vales for D,E & M aluminum cylinders. Especially interested in CGA 540 valves with metal Hand Wheels. If you use Plastic hand wheels do you sell replacement hand wheel as the plastic handwheels crack and break off. **** Hidden Message ***** Bruce Yanz 14610 Company: McCarthy Fire & Emergency Suppy Company, Inc. E-mail: byanz@frontiernet.net **** Hidden Message ***** byanz@frontiernet.net