100 per box, Color: White. This spiral binding coil can not used with 4:1 pitch binding machine
3:1 Pitch coil binding ring means per inch has 3 holes (This is very important distinguish 3:1 from 4:1 cause the things to be as different. 4:1 means per inch has 4 holes. They are used with different binding machine.)
3:1 pitch spiral binding coils great for reports and presentations with any 3:1 pitch coil binding machine