These autosampler vial caps provide a reliable and leak-proof seal for your sample vials. Suitable for HPLC, GC, LC/MS applications, and high-throughput analysis for reliable results in lab and laboratory.SpecificationColor: Blue, WhiteMaterial: Polypropylene, PTFE, SiliconeBottle Cap Mouth Size:9mm / 0.35″Size: 12 x 6mm / 0.48 x 0.24 inch(D*H)Packing List: 1000 x Vial Screw CapsAdvantageGreat Material: Made from durable materials, these caps are designed to withstand rigorous laboratory use without compromising the integrity of your samples.Convenient Color-Coding: The red PTFE/white silicone septa combination allows for easy identification of different sample types or applications.InstructionThe caps feature user-friendly threading that allows for quick and effortless application and removal, saving time.