2.0 mL Big Mouth Step Design Screw-Thread Vials, 10 mm (vial only)

40% larger opening than other vials.
Step profile automatically centers glass flange limited volume inserts. 
Preassembled caps with septa, with or without vials.
Designed for Waters Alliance autosamplers.
The Big Mouth Step vial system has a larger ID than conventional vials and incorporates a neck finish that is uniquely designed to allow the insert to be precisely aligned in the center of the vial. This precise alignment provides maximum sample withdrawal and eliminates any chance of missed injections.