Specially suited for research studies, this vial is marked with a blue line at the 3mL level. It can be sterilized and stored at low temperatures. Black phenolic caps have a white 14B rubber liner. Vials are packaged in corrugated trays with partitions. They are manufactured from Wheaton 33® low extractable borosilicate glass (meets ASTM Type I Class A and USP Type I standards) to protect against changes in pH and to maintain the purity of the contents. Fits M-T Vial File 12-228780.