School Smart 8-Digit Large Beginner Calculator, Basic Math, 3-1/2 in W X 4-1/2 in H Sold as a Pack of 12 Griffin-style beaker with a spout for use in education, chemistry, research, and life science applications Borosilicate glass for clarity, strength, heat and chemical-resistance Provides a balance between thermal shock resistance and mechanical strength Double-graduated metric scale markings in 25ml intervals and extra-large marking spot for ease of use