Alpha Nanotech Agate Mortar And Pestle (Inner Diameter 70 Mm

Size 1: Internal Diameter: 30 mm (1.2), External Diameter: 40 mm (1.5), Inner Depth: 10 mm (0.4); Size 2: Internal Diameter: 50 mm (2); External Diameter: 60 mm (2.4) Inner Depth: 15 mm (0.6) Size 3: Internal Diameter: 70 mm (2.8), External Diameter: 90 mm (3.5), Inner Depth: 21 mm (0.8), Size 4: Internal Diameter: 100 mm (4), External Diameter: 125 mm (5), Inner Depth: 30 mm (1.2) Brazilian agate stone only; Standard form. Hardness: 7.0-7.2; Pressure-resistance, Heat-resistance, chemical-resistant; A silicone mat is included with the shipment to place under the mortar for the best grinding practice.