Aijiren 2ml snap neck has 40% lager target area which makes it much safer for the autosampler needle. Snap vials can be closed with either snap caps or crimp caps. Snap cap vials cannot be pressurized, but can be easy as push-on, pull-off by hand. A audible click ensures a secure seal has been formed and that the cap is correctly aligned. Precision-formed neck improves autosampler handling.