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A mortar and pestle is used to grind up solid chemicals into fine powder and crush solids into smaller pieces. HST’s brand features a glazed porcelain pestle (the club used for crushing) and the exterior of the mortar (the bowl) is also glazed. The mortar’s interior is unglazed for more effective grinding. The rims have integrated pouring spouts. Sizes range from 80 ml to 500 ml capacity.