Case-it Locker Ringer Accessory Presentation Binder with 1-Inch O-Rings, Purple, PRE-02-PUR Ringer binder, 1-inch binder that hooks into the Locker Binder system Sturdy water-resistant fabric with bound edges Perfect for middle school, high school, or college students studying multiple subjects Like having a portable locker - bring your files on the road Available in a variety of colors, mix and match with other Locker Binder System insert accessories (sold separately)