UNITED SCIENTIFIC Mortar & Pestle Set, Agate Stone, 50mL, Mortar OD 4.0"

Octagonal mortar and pestle sets feature highly polished grinding surfaces. Made of naturally hard agate stone (6.5 on Mohs' Scale). For use in laboratories demanding contamination-free results. Physical dimensions have a tolerance of +/- 3mm. Note that the natural agate material causes surface pattern variations in finished mortars and pestles.