Auto Disable Syringe Product Features High clarity transparent barrel molded by using premium quality medical grade polypropylene. Auto-Disable (AD) prevents the re-use of syringes. Highly transparent barrel & contrast black graduation. After completion of the dose, the plunger is automatically locked and will break when retracted. Sterile, non-toxic and pyrogen free. Available with or without needle. Auto-Disable Syringes for Mass Distribution Contact for Pricing