250µL Glass Flat Bottom Insert w/ID Ring, 5x31mm 4025-531ID

Flat Bottom Glass and Polypropylene Inserts. Flat Bottom Inserts are an economical alternative to the conical limited volume inserts. Designed for use in 2mL standard opening crimp top and screw thread vials. Available with ID ring, at the top of the insert, for easy open-end identification. Flat Bottom Inserts are available silanized or precleaned.