Sodium Chloride 0.9% IV Flush Prefilled Syringes 5 mL fill in 6 mL x 60/Box (Rx)Medefil MIS 1125 Prefilled Sodium Chloride 0. 9% IV Flush Syringes 5 mL x 60 Box. IV Flush Syringes use IV flushes to clear out intravenous lines that deliver medicine directly into the veins of a patient. Flushes are administered before and after starting IV medication drips or fluids in patients. This ensures the lines stay clean and prevents blockages. No Preservatives Not made with Natural Rubber Latex No Reflux Flushing DEHP Free, PVC free