Amazon.com: Charles Leonard 61602 Varicap6 Expandable 1 to 6 Post Binder, 11 x 8-1/2, Blue : Office Products
Order post binders, and ledger binders, custom made binders, leather post binder, high grade plastic, canvas binder for corporate and government record keeping
Pressboard Hanging Binder, 2 Posts, 6" Capacity, 9.5 x 11, Light Blue - BOSS Office and Computer Products
Spectra Associates: Post Binder - You Custom Size - Up to 12" (Paper Height)
Vintage Legal Size Post Binder Ledger Expandable Blue - Etsy