1, 360 pieces watch band link cotter pins with box. 360 Pcs Watch Band Link Cotter Pin (with Box). 18 different sizes: 6mm,7mm,8 mm, 9mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm.