16 Writing, drawing, painting and modeling materials, office and counter utensils (except furniture), teaching materials, especially writing, drawing, music writing and round nibs, nibs and tools for artistic writing, nibs for fountain pens; fountain pens, mechanical pencils, twist-action pencils, ballpoint pens, map library supplies, namely, maps, boxes, braking devices, index cards, index cards and map library stands; inkstands, rulers, letter file punches, blotting pads, letter files, letter openers, book holders, scrapers, pencil sharpeners, pen wipers, erasers, book clips, pen holders and writing trays