Feature●Agate mortars and pestles are the ideal tools for grinding a matrix of a solid sample powder in preparation for making a transparent pellet free from spurious absorption peaks. Pure agate is non-absorbing in an infrared spectrophotometer.●Internal diameter: 65 mm (2.56"); external diameter: 80 mm (3”.15) ; inner depth: 16 mm (0.63”); Height: 35mm(1.38”); Pestle Size: 14*24*75mm; Physical dimensions have a stated tolerance of ±3mm●Octagonal mortar is made of naturally hard agate stone;●Hardness: 7.0-7.2; Pressure-resistance, Heat-resistance, chemical-resistant; Features highly polished grinding surface for optimal results;●A silicone mat is recommended to place under the mortar for the best grinding practice;Description