13mm Glass Autosampler Vials from Aijiren. The Aijiren 15x45mm vial has a 13-425 GPI thread that can hold up to 4ml of samples. Use a 13 x 425 cap with a septum when using it as a sample vial, or a diffusion cap for a cleaning vial. Sealed screw seals allow these vials to also be used as storage vials.