The SampleLock combines a quality Gastight® syringe with an easy-to-use twist valve. The valve allows sample collect, store, transport, and analyze liquid or gaseous smaples without the danger of evaporative loss or environmental contamination. Common applications for SampleLock syringes include environmental sample collection and storage, pre-pressurization of gaseous samples for GC analyses, and sample spiking. 22s gauge removable needle, 2" length, point style 2 (sharp).