DSB CB-230 Like Sirclebind 3-Hole Punch & Plastic Comb Binding Machine Punch Style: A4 size 4-Hole & Plastic Comb up to 20 sheets (20# paper) Binding Style: Plastic Combs up to 2" diameter combs Has adjustable Margin Guide and vertical paper load Max. Page Size: A4 / 11"+ Letter w/Open Throat Warranty: 2 year