staple Nail book needle size: 10 #, unified (24/6), 26/6, thick layer ShuDing: 23/ ... have a kind of were of brass.Nail book needle size: 10 #, unified (24/6), 26/6, thick layer ShuDing: 23 ... two needle wide 11.5 mm, high depends on the size of the ShuDing denominator. staple