These culture vials feature deep-skirted screw caps to allow safer, more dependable handling when working with infectious materials. Pre-attached solid-top black phenolic screw cap with 14B rubber liner can be autoclaved. Vials are packaged in corrugated trays with partitions. Vials are manufactured from wheaton 33 low extractable borosilicate glass that conforms to ASTM type I, class a and USP type I requirements. Use M-T Vial file (Cat. No. 228780) for storing 4 ml vials.
