The Merlin Microseal is a microvalve alternative to the conventional silicone rubber septa used in gas chromatography (GC). Its unique design gives it high pressure capability and resistance to wear. This results in long life, lasting for thousands of injections and saving instrument downtime for septum changes. The design also eliminates septum coring, yielding excellent chromatographic performance. The Microseal is ideal for high-throughput automated testing and for SPME analysis.