This is an agate mortar and pestle set. I am selling it because I no longer need it. Features: Low abrasion and high compressive strength, with excellent chemical resistance to acids and alkalis. No impurities are mixed into the substance being ground. Specifications: Material: Agate Inner diameter x outer diameter x depth (mm): φ90 x φ110 x 38 Includes pestle Mortar weight (g): Approximately 1000 Pestle weight (g): Approximately 135 Model number: Deep type RoHS2 (EU) 2015/863 compliant [About RoHS]