20-120 sheets ( 20#/80gsm ) Binding Capacity; Including Color: Black, Gold, Blue, White, Silver; Pitch 3:1, 32-hole pattern and 9/16 inch; Binding letter size and below size paper (cut the over size part); Perfect for internal reports and functional documents. Especially binding using with Rayson TD-132, TD-1500B34, TD-1500B34R, TD1202, TD1202R wire binding machine or any other 3:1 pitch punching machine; Permanent binding keeps pages in place. Available in several diameters with Rayson. These Wire-O binding wire, also called "double-wire" or "twin-loop binding wire," is a versatile binding spine, with 3:1 pitch and 32-loop are available in a wide range of sizes that offers security and durability, but with style and affordability. The wire binding spines are 11 inches in length and are designed to be used with Letter size documents. However, they can also easily be cut with wire cutters to accommodate books with spines smaller than 11 inches long and can then used with a binding machine TD132, TD1202, TD1202R, TD1200, TD1200R, TD-1500B34, TD-1500B34R perfect for binding reports, presentations and any other book binding projects.