BD SafetyGlide™ Shielding Hypodermic Needle 21g x 1-1/2" (305917). The safety mechanism is built into the needle and the needle can be manually attached to a conventional syringe or a prepared prefilled syringe. Allows for fast and easy, single-handed needle shielding activation after the injection, promoting patient comfort and clinician safety. Reliable performance, outstanding quality, and safety features. 50/BX 10BX/CS. Priced per box.