Alltech SelectPro Rheodyne column switcher valve selector HPLC EV550-104-AL

Used working Alltech SelectPro column selector model EV550-104-AL. Checked in local mode- switch from 1 to 6 position works smoothly. The 24v power adapter is included.. The front plastic lid does not included. If not satisfied. You can return this unit within 30 calendar days for a full refund minus shipping.Lot con5/5top