21 Household or kitchen utensils, namely, strainers, spatulas, graters and household containers; combs and cleaning sponges; scrubbing brushes, excluding paint brushes; brush-making materials; articles for cleaning purposes, namely, cleaning cloths and cleaning sponges; steelwool; unworked or semi-worked glass, except glass used in building; glassware, porcelain and earthenware not included in other classes, namely, works of art made of glassware, porcelain, and earthenware