AMSure Flat Top Piston Syringe, 60 mL, with ENFit Tip, Non-Sterile.ANSure Flap Top Piston Syringe with ENFit tip has visible dosing marks designed for ease of use. The syringe is compliant with the ENFit ISO 80369-3 design standard which supports the goal to improve patient safety by reducing the risk of misconnections.