These combs measure 1" in diameter and can hold up to 168 pages. 50 per box. Tough and resilient, they are compatible with all standard 19-ring binding systems including USI, GBC, HIC, Ibico, NCS and Tamerica.

• Durable plastic combs lend a professional touch to bound documents.
• Perfect for binding reports, presentations, school projects, and more!
• The 19-hole combs can be reopened to add or subtract pages as needed.
• Compatible with any standard 19-hole binding system, including USI, GBC, Fellowes, Renz, and more!
• From USI...the quality leader since 1975!