Replacement polycarbonate center cylinders for 6751 Small Grinding Vial Set, 6761 Small Poly-Vial Set, and 6771 Small Cr-Free Grinding Vial Set. Sold as a pack of 20.
Transparent plastic center cylinder allows visual checking of the grinding progress.
Withstands liquid nitrogen temperatures.
Polycarbonate center cylinders are disposable or may be cleaned with hot water and detergent or RNase/DNase-free solution.
