Nail book needle size: 10 #, unified (24/6), 26/6, thick layer ShuDing: 23/8, 23/ ... P Mn Si, and a small number of Cu etc, including the content of Fe in 99% around. Staples have two ... kind of were of brass.Nail book needle size: 10 #, unified (24/6), 26/6, thick layer ShuDing: 23/8, 23 ...