Glass fibers in skeins for use in the manufacture of building insulation; glass fibers in skeins for use in the manufacture of fireproofing materials for roofing; glass fibers in skeins for use in the manufacture of electrical insulating tape; glass fibers in skeins for use in the manufacture of fireproof textiles; glass fibers in skeins for use in the manufacture of electrical insulation materials

Strings of glass fiber not for textile purposes, namely, glass fibers and filaments for use in the manufacture of electrical insulating materials, glass fibers and filaments for use in the manufacture of thermal insulation, and glass fibers and filaments for use in the manufacture of fireproofing materials