14.75 x 32 mm clear borosilicate crimp neck serum vial with 13 mm neck finish. crimp-top glass serum vials are suitable for pharmaceutical packaging, lyophilization, and sample storage. These borosilicate glass serum vials are break resistant and typically used for handling and containment of pharmaceuticals and serums. These crimp-top vials are also ideal for packing and storing blood plasma, media, reagents and vaccines.