Free Call: 1800 723 405 - sales@pacif iclab.com.au 5 2ml Snap Top Vials Caps 1ml Shell Vials ˜ 11mm, 2ml, snap neck. ˜ Widely used in HPLC applications, universally usable vials for most autosamplers, including robotic handing. ˜ Snap vials can be closed with either snap caps or crimp caps.