Glassware; laboratory, hygienic or pharmaceutical, whether or not graduated or calibrated, of fused quartz or other fused silica

701710 Of fused quartz or other fused silica:

7017103000 Quartz reactor tubes and holders designed for insertion into diffusion and oxidation furnaces for production of semiconductor wafers

7017106000 Other

70171000 Of fused quartz or other fused silica

70171000 Of fused quartz or other fused silica

7017100000 Of fused quartz or other fused silica