1-inch 2-hole-3602-back width 35mm (about 160 a4 sheets) 1-inch 3-hole-3603-back width 35mm (about 160 a4 sheets) 1-inch 4-hole-3604-back width 35mm (about 160 a4 sheets) 1.5-inch 2-hole-3702-back width 45mm (about 240 a4 sheets) 1.5-inch 3-hole-3703-back width 45mm (about 240 a4 sheets) 1.5-inch 4-hole-3704-back width 45mm (about 240 a4 sheets) 2-inch 2-hole-3802-back width 60mm (about 300 a4 sheets) 2-inch 3-hole-3803-back width 60mm (about 300 a4 sheets) 2-inch 4-hole-3804-back width 60mm (about 300 a4 sheets) 3-inch 2-hole-3902-back width 80mm (about 500 a4 sheets) 3-inch 3-hole-3903-back width 80mm (about 500 a4 sheets) 3-inch 4-hole-3904-back width 80mm (about 500 a4 sheets) 4-inch 2-hole-4102-back width 105mm (about 650 a4 sheets) 4-inch 3-hole-4103-back width 105mm (about 650 a4 sheets) 4-inch 4-hole-4104-back width 105mm (about 650 a4 sheets)

a4-white