Buy 2" Standard Black Round Ring Clear View Binders - 12pk (SRRCV200BK)
3-ring Binders and Case-it Zipper Binders — Campus Survival Kits and Insta-Kits
Avery® Economy View 3 Ring Binders, 1" Round Rings, 1 White Binder (19601) | Avery.com
Machina 3-Ring Binder | Pina Zangaro
Amazon.com : 1-inch 3 Ring Binder with 2 Interior Pockets, 1'' Basic Binders Holds US Letter Size 8.5'' x 11'' Paper - Durable, Versatile Binders for Office, Home, and School Use, 6