... : 10 #, unified (24/6), 26/6, thick layer ShuDing: 23/8, 23/10, 23/13, 23/15, 23/17, 23/19 ... : 10 #, unified (24/6), 26/6, thick layer ShuDing: 23/8, 23/10, 23/13, 23/15, 23/17, 23/19 ... .Book needle specification: 10 # book machine two needles wide for 8.4 mm, high for 5mm. Other ShuDing two needle wide ... mm, high depends on the size of the ShuDing denominator. staple