Autosampler Vials, 12 x 32mm, 9mm Threaded, Large Opening, RAM™ Glass Vials, 12 x 32mm, 9mm Threaded, Large Opening, RAM™ Universally compatible with almost all autosamplers, the vials have an opening that is 40% larger than standard 8mm thread. The only vials with every glass thread tooled to dimensions that mirror the cap.