1.5mL amber glass vials (no caps) with writing patch and approx. 500µL gradations. Recommended for light-sensitive samples. Cleanroom packaged, 1st hydrolytic class, wide opening (9mm) can accommodate a low-volume insert. Use caps with PTFE/silicone standard or pre-slit septa, or PE septumless cap. Note that the septumless cap is a thin membrane and NOT resealable after punctured by the autosampler needle. For multiple injections from the same vial, a cap with a PTFE/silicone septum is recommended.