Maximum capacity: 25 sheets of loose leaf paper. The paper is pH neutral and of archival quality. Wider, frosted cover protects and displays index tabs clearly. Set Included 3 binders + 1 filler paper 3 binders + 2 filler papers 3 binders 5 binders + 3 filler papers 5 binders + 2 filler papers 8 binders + 2 filler papers 1 binder.