TruBind 10-mm (3/8-inch) Binding Combs - COMB0308 - Durable - 19-Ring - 11 Inches Long - Pre-Sized to Fit Letter-Sized Paper - Compatible with TruBind Binding Machines - 100 per Box QUALITY PLASTIC - Easily create bound projects that lay flat with our binding combs. Their durable plastic construction wont bend or snag, and they look great on business proposals, reports, menus, and more. PRECUT COMBS - Each TruBind comb is 11 inches long and fits a letter-sized book, document, or binding project perfectly. The flexible plastic can also easily be cut with scissors to accommodate smaller projects. 10-MM PRE-SIZED COMBS - These TruBind plastic combs measure 10mm, or 3/8 in diameter, for increased durability and holding strength. Easily bind books, documents, or reports in-office with pre-sized combs. BINDING CAPACITY - Our plastic combs can hold up to 55 sheets of standard 20# copy paper each when bound. That equals a maximum binding capacity of 5/16 inches in thickness, perfect for most office projects. STANDARD 19-RING RECTANGULAR HOLES - Compatible with most standard 19-ring binding machines, our plastic combs have 19 rings per 11-inch comb. The 19 rectangular holes match the punching pattern on the side of your book.