Staples Heavy Duty 1 1/2" 3-Ring Flexible Poly Binder, Black (ST62615). The 3 sturdy o-rings open and close with reliable action without cracking or chipping, holding your documents reliably time after time. Holding up to 275 sheets, this binder is great for larger projects with a lot of paperwork. While it's engineered from strong plastic that resists damage, it's still flexible and lightweight so you can easily take it along with you offsite or around the office. This binder is just what you need to keep your work organized and accessible. Clear view cover pocket to organize or personalize your documents. 1 1/2" binder with flexible cover in black. 3 sturdy O-rings hold up to 275 sheets of 8.5" x 11" paper with reliable strength. Durable protective flexible plastic that's lightweight portable. Sold as 1 Each.