The Bard Medical Urine Meter Drain Bag 2000ml w/Port Each are used to accurately measure urine output and are typically used in surgical and critically ill patients. Bard offers a wide range of sizes including 200ml, 350ml, 400ml, and pediatric sizes. Features: Bard Safe Sampling Port Allows For Needle-Free Aspiration. Anti-Reflux Device. Double Hook Hanger. 200mL Meter, 2000mL Bag. Single-Use, Sterile.