Practi-Heparin Lock Flush 3 mL Syringe™ For TrainingWallcur's Practi Heparin Lock Flush 3 mL Syringe is a 10 mL syringe with 3 mL of pre filled distilled water. Our Practi Heparin Lock Flush 3 mL Syringe simulates a 100 unit mL heparin lock flush, and is safe for manikins and simulators that accept liquid injection per the manufacturer's guidelines. Qty: 30 syringes NOT FOR HUMAN OR ANIMAL USE. FOR TRAINING PURPOSES ONLY.