Clear vials, blue screw caps, pre-slit blue PTFE silicone septa 100/pk 5183-2082 Clear vials with write-on spot, blue screw caps, pre-slit blue PTFE silicone septa 100/pk 5183-2083 Pre-assembled packs come ready to use with the cap and septum of your choice attached to the vial. A time/labor-saving product for use on your Aijiren Autosampler