These high quality Black 1/4" 2:1 Pitch Twin Loop Wires are some of the best wire binding spines on the market today. Also called Wire-O, WireBind, and Double Loop Wire, these black 1/4" 2:1 pitch elements let pages lie flat with 360 Degrees rotation for convenient note-taking and photocopying as well as provide a permanent bind to your documents--meaning your pages stay secure and protected. Not only that, but these black 1/4" 2:1 pitch wire spines look a tad more refined than a plastic comb or spiral coil. Measuring 1/4" in diameter, these black twin loop wires can hold approximately 20-30 sheets. These black 1/4" 2:1 pitch twin loop wires come open in a "C" shape, allowing you to insert the spines into your punched pages and then simply use your wire binding machine or wire closer to finish your books. Product number W140BK21.
| Size | Pitch | Approximate Capacity (20# Paper) |
| 1/4" | 2:1 Pitch (21 Loops) | 5-45 Sheets |
| 5/16" | 2:1 Pitch (21 Loops) | 45-60 Sheets |
| 3/8" | 2:1 Pitch (21 Loops) | 60-75 Sheets |
| 7/16" | 2:1 Pitch (21 Loops) | 75-90 Sheets |
| 1/2" | 2:1 Pitch (21 Loops) | 90-105 Sheets |
| 9/16" | 2:1 Pitch (21 Loops) | 105-120 Sheets |
| 5/8" | 2:1 Pitch (21 Loops) | 120-135 Sheets |
| 3/4" | 2:1 Pitch (21 Loops) | 135-160 Sheets |
| 7/8" | 2:1 Pitch (21 Loops) | 160-190 Sheets |
| 1" | 2:1 Pitch (21 Loops) | 190-220 Sheets |
| 1 1/8" | 2:1 Pitch (21 Loops) | 220-240 Sheets |
| 1 1/4" | 2:1 Pitch (21 Loops) | 240-280 Sheets |
| 1 1/2" | 2:1 Pitch (21 Loops) | 280-310 Sheets |
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