Introducing our premium quality 18mm screw for GC GCMS instrument clear headspace vial metal caps. We pride ourselves as a reputable factory, consistently delivering superior products to our valued customers. These caps are meticulously crafted to ensure compatibility with your GC GCMS instruments, guaranteeing optimal performance and reliability. Designed with precision, they create an airtight seal, preserving the integrity of your samples during headspace analysis. Impeccable in quality, our metal caps boast durability and longevity, allowing for repeated usage. Trust in our factory-made caps for unmatched accuracy and precision in your laboratory experiments. Upgrade your GC GCMS instruments today with our exceptional 18mm screw metal caps!