Rayson CR1912M-100 Plastic Binding Combs 1/2in. 19-Ring, 90-Sheet Capacity, Colorful Comb Binding Spines, Max. Binding Letter Size Paper, Box of 100

The 19 holes comb binding ring fits letter sized paper (8.5 x 11.0inches). Sheet Capacity: 90

Spine Diameter: 1/2"

Number of Rings: 19. Get a professional edge! Quantity/Unit - 100/Box. Available in a variety of sizes and colors to bind 2-90 page documents. 3mm margin for binding 2-90 sheets ( max. binding thickness: 9.5mm/0.37in), 6mm margin for binding 60 sheets ( max. binding thickness: 8mm/0.31in). Designed for a variety binding of paper size. Perfect for internal reports and functional documents.