This cylindrical style graduated addition funnel has a threaded, grease-free extended tip PTFE plug that permits semi-needle valve action. The standard taper top outer joint and lower inner joint are the same size. The funnel is graduated with a double scale of numbers, one up from the stopcock and one down from the capacity line and has a pressure equalizing arm. The 14/20 models are supplied with a CG-3000 stopper.. The overall height is identical to the corresponding CG-1704 model. The valve is 0-2 mm on the 125 mL sizes and smaller and 0-4 mm on the 250 mL sizes and larger. For a similar item with a metering stopcock valve see CG-1713.