Multidose Automatic Pistol-grip Syringe (30ml / 50ml), Metal Body, Luer Lock, Adjustable Dose 1,2,3,4,5 ml increment Heavy Duty Metal Body, Unbreakable Plastic Barrel, Luer Lock, Sterilizable 120c Pistol-grip syringe is designed for easy one-hand operation. Easy dose adjustment system. Rear dose selector with 1, 2, 3, 4, 5 ml increments. Ideal for rapid use. Unparallel accuracy dose after dose.