Product#: TG-1790 Availability: This item normally ships within 1 - 2 business days. Description: Vertical sidearm tube which has a take-off tube sealed onto its lower portion. The take-off tube has an 18/9 ball joint at the end. Above the take-off tube a standard taper (19/38) outer joint is placed and closed by a 19/38 stopper with a sealed off extension tube. Within this tube, a glass tube containing a sealed in magnet on the top and a ball shaped bottom, is placed such that when resting freely the ball closes the take-off path. A solenoid may be used to control the inner tube. Other two joints are of the same size, unless otherwise requested.