Class A threaded flask with open-top phenolic cap and PTFE-lined silicone septum for syringe access

·          Closed-top phenolic cap with PTFE-faced white rubber liner also included

·          Calibrated to contain

·          V-shaped bottom provides convenient sample retrieval

·          Sandblasted base for writing

·          Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements