These black 1/4" Spiral-O 19 Loop Wire Spines are perfect for binding your most important documents as they will add a touch of elegance that can't be matched by plastic comb or color coil binding supplies. The black 1/4" 19-loop wire is designed to work with any 19-ring plastic binding system that will accept wire bindings. While these black 1/4" wires are intended for use with the Ibico Ibimaster binding systems, they can be used with any comb binding machine provided you have a wire closer . This black Spiral-O 19 Loop Wire measures 1/4" in diameter and can hold approximately 40 pages. Also available in multiple sizes and colors. Product number 12N014BLACK.