Get durability, clarity and accuracy from Thermo Scientific™ Manual Fixed Needle, Gas Tight Syringes. Used for manual sample injection into gas chromatography (GC) instrument, they provide accuracy and reproducibility that gives you confidence in analytical results, time-after-time. These syringes have an affixed needle and a plunger that creates a tight seal with the barrel. Choose from a variety of sizes and types. They are available in standard industry size with black easy-to-read and solvent-resistant markings.