Pitch Spiral Binding Coil  7mm 4:1 -100pk, Black 12-inch long Spiral Binding Coil (Pack of 100) 4:1 Pitch, 4 loops per inch 7mm (9/32" inside diameter) Binds up to 42 pages of standard 20 lb bond paper Colors May Vary Somewhat from Photos, Manufacturer's Color designation is Black (No PMS designation)