F 310

Household and kitchen devices and containers; combs and sponges; brushes (except for painting purposes); brush materials; cleaning utensils; steel wool; unworked or semi-worked glass (except glass used for construction purposes); glassware, china and earthenware, to the extent they are not included in other classes; fused quartz glass, fused silica and semi-finished products manufactured therefrom, in particular pipes, bars, boards, blocks; unworked or semi-worked fused quartz glass; semi-finished products from fused quartz glass for the manufacture of optical fibers; silica fibers, not for textile purposes.