Product#: TG-4990 Availability: This item normally ships within 1 - 2 business days. Description: Flask with center joint and two side joints 180-degrees apart. The third side joint is 90-degrees from the other two side joints. The 90-degree neck is a standard taper (10/30)outer joint for holding thermometers, bleed tubes, or gas inlet/outlet tubes. It may also serve as a sampling port.