AFD¹ Setting: 1ml, 2ml, 3ml, 4ml, 5ml, 6ml, 7ml, 8ml, 9ml, 10ml, 11ml, 12ml, 13ml, 14ml, 15ml, 16ml, 17ml, 18ml, 19ml, 20ml. (AFD refers to prodigy instruments "adjustable fixed dose" system. Adjust piston seal ring to the desired dose graduation then fix in place with lock nut tightened on dose selector screw)