7017.20 Laboratory, hygienic or pharmaceutical glassware, whether or not graduated or calibrated, having a linear coefficient of expansion <= 5 × 10 -6 per kelvin within a temperature range of 0 oC to 300 Co (excl. glass of fused quartz or other fused silica, contantainers for the conveyance or packing of goods, measuring, checking or medical instruments and apparatus of chapter 90) 0 0 0 0 0