250µL Black Polypropylene Big Mouth Conical Limited Volume Insert, 6x31mm, Precision-Formed Interior, w/Bottom Spring 425PBS-631BK

Conical Polypropylene Inserts. Due to the conical design of the snap plug, limited volume inserts used in the shell vial stay centered and straight allowing for easy sample evacuation. Limited volume inserts are available silanized or precleaned.