Section 13 Articles of stone, plaster,cement,asbestos, mica or similar materials; ceramic products; glass and glassware 70 Glass and glassware 70 17 Laboratory, hygienic or pharmaceutical glassware 70 17 20 Of other glass having a linear coefficient of expansion not exceeding 5 x 10-6 per Ke Commodity Code Description 70 17 20 00 Of other glass having a linear coefficient of expansion not exceeding 5 x 10-6 per Ke