Made to a tighter tolerance than plastic syringes, these glass syringes are better at dispensing small, precise samples with little left over. They’re also durable and resistant to chemicals, so they’re unlikely to wear or warp from your samples, so they'll have a long, reliable life. Their precision makes them great for gas chromatography.

When precision is a top concern, choose between a threaded and cemented connection. They’re both designed for the needle to sit exactly at the zero graduation mark, which minimizes leftover material in the barrel after dispensing. Syringes with a cemented connection come ready to use with a needle permanently attached. They’re often used with syringe pumps. However, once the needle bends, breaks, or clogs, the entire syringe has to be replaced. They also aren’t autoclavable.

Syringes without a piston resist wear and are nearly frictionless to operate.