300µL Glass Conical Limited Volume Insert, 6x38mm, Precision-Formed Mandrel Interior, w/Patented Top Spring™ 403TS-638

Conical Glass Inserts. Inserts are available preassembled with a polymer bottom spring or patented Top Spring™. The polymer spring acts as a shock absorber that protects against breakage if the needle bottoms out. The conical design permits complete sample removal.