About the product
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") Size 5: Internal diameter: 120 mm (4.7 ); external diameter: 140 mm (5.5 ) inner depth: 35 mm (1.4 ); Size 6: Internal diameter: 150 mm (5.9"); external diameter: 180 mm (7.1") inner depth: 40 mm (1.6") Brazilian agate stone only; Standard form; Due to slow restocking to Amazon warehouse (i.e. FBA), orders are selectively fulfilled by merchants directly (i.e. FBM); Hardness: 7.0-7.2; Pressure-resistance, Heat-resistance, chemical-resistant; A silicone mat is recommended to place under the mortar for the best grinding practice;