National Scientific 15x45mm 4mL Screw Thread Vials

# Superior quality 33 expansion borosilicate clear glass (Type 1, Class A) or 51A amber glass

# Uniformly flat bottom for security with inserts

# I-D vials feature write-on patch

# AP2000 High Recovery vials feature a tapered bottom for maximum sample extraction

# Glastic vials have a glass insert fixed inside of a plastic vial

# Deactivated vials are available with either NSC Silanization or Kimshield™ pretreatment