Magellan Safety Syringes 21 Gauge x 1" L Needle 3 mL, Sterile, Latex-free. Unlike other safety devices on the market, the Magellan Safety Needle features a robust shield that encases the entire cannula after activtion, which protects downstream workers. Its proprietary integrated locking mechanism prevents deactivation of the device once the safety shield has been locked into place. Every Magellan Safety Needle may be activated using any of the following methods: thumb, finger or flat surface.