300 uL PP Trispring Insert for WISP Vial (100/pk)

Allows small volume sampling in 15x45 mm vials. The trispring insert has a plastic support spring permanently attached, to center the insert and act as a shock absorber to prevent needle damage. 300 µL polypropylene tapered-bottom TriSpring insert for 4 mL, 15x45 mm vials. <br><br> Packaged: 4" x 6-1/2" Plastic bag; Weight: 34.0 g.