Herlitz Ring Binder, A4, 2 Rings, Filling Height 25 mm, Polypropylene Film, Transparent : Amazon.de: Stationery & Office Supplies
PP 2-Ring Binder | 無印良品 MUJI
Esselte Präsentationsringbuch, A4, Weiß, 2-Ring, 30 mm (ES-49709)
Amazon.com : Lever Arch 2-Ring Binder; U.S. Letter Size; for 2 3/4" (7 cm) Center-to-Center (cc) Paper Punches (Not for A4 Documents with 8 cm cc Spacing) (1 Assembled Binder, Blue) : Office Products
5x Ring Binder A4 2 Rings 16 mm Thick / Extra Sturdy : Amazon.de: Stationery & Office Supplies