Arterial Cannula with Floswitch 20g 45mm (x25)This catheter is designed for insertion into peripheral arteries, for the determination of blood gas estimations or monitoring blood pressure. The Floswitch on off device prevents back flow, thereby reducing the risk of air emboli and potential contamination by exposure to blood. It has Venflon like insertion characteristics and wings to facilitate fixation. 20g. 45mm. Pack of 25.