Subheading 700210: Glass; Unworked, in Balls (other than Microspheres of Heading No. 7018)
Subheading 700220: Glass; Unworked, in Rods
Subheading 700231: Glass; Unworked, in Tubes, of Fused Quartz or other Fused Silica
Subheading 700232: Glass; Unworked, Tubes, of Glass Having a Linear Coefficient of … etc.
Subheading 700239: Glass; Unworked, in Tubes, other than of Glass Having a Linear … etc.