Section 13 Articles of stone, plaster,cement,asbestos, mica or similar materials; ceramic products; glass and glassware 70 Glass and glassware 70 02 Glass in balls (other than microspheres of heading†7018), rods or tubes, unworked Commodity Code Description 70 02 10 Balls 70 02 20 Rods 70 02 31 ¿ Of fused quartz or other fused silica 70 02 32 ¿ Of other glass having a linear coefficient of expansion not exceeding 5 x 106 per Kelvin within a temperature range of 0oC to 300oC 70 02 39 ¿ Other