7002 Glass in Balls, Rods or Tubes, Unworked (Excl. Glass Microspheres <= 1 mm in Diameter, Glass Balls of the Nature of a Toy)

7002 (01/1988-..) Glass in Balls, Rods or Tubes, Unworked (Excl. Glass Microspheres <= 1 mm in Diameter, Glass Balls of the Nature of a Toy) 70021000 (01/1988-..) Glass in Balls, Unworked (Excl. Glass Microspheres <= 1 mm in Diameter, Glass Balls of the Nature of a Toy) 70022010 (01/1988-..) Rods of Optical Glass, Unworked 70022090 (01/1988-..) Rods of Glass, Unworked (Excl. Optical Glass) 70023100 (01/1988-..) Tubes of Fused Quartz or Other Fused Silica, Unworked 70023200 (01/1988-..) Tubes of Glass Having a Linear Coefficient of Expansion <= 5 x 10-6 per Kelvin Within a Temperature Range of 0??c to 300??c, Unworked (Excl. Tubes of Glass Having a Linear Coefficient of Expansion <= 5 x 10-6 per Kelvin Within a Temperature Range of 0??c to 300??c) 70023900 (01/1988-..) Tubes of Glass, Unworked (Excl. Tubes of Glass Having a Linear Coefficient of Expansion <= 5 x 10-6 per Kelvin Within a Temperature Range of 0??c to 300??c or of Fused Quartz or Other Fused Silica)