Fritted barium borosilicate glass with a mean particle size between 0.4 and 10 microns, Young's modulus of 71GPa, a density of 2.8 grams per cubic centimeter, radiopacity of 4.2, a refractive index of 1.53, and chemical composition of 55 percent silicon dioxide, 25 percent barium oxide, 10 percent boron trioxide and 10 percent aluminum oxide by weight (provided for in subheading 3207.40.10)
Part of: 99 — Temporary legislation; temporary modifications (US)
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