8mm Navy 4:1 Pitch Spiral Binding Coil - 100pk MyBinding P125-08-12 Navy Length: 12" Letter Approximate Capacity: 54 Sheets (20# Bond) Hole Pattern: 44 Hole Quantity: 100 Per Box The GBC / Ibico 4:1 pattern utilizes holes that are 0.2475 center to center with 44 holes on an 11 binding edge. The industry standard pattern for color coil utilizes holes that are 0.250 center to center with 43 holes on an 11 binding edge. The 5:1 pattern for coil binding utilizes holes that are 0.200 center to center with 55 holes on an 11 binding edge.