Amazon.com : Kokuyo Campus Smart Ring Binder, Up to 25 Sheets, B5, 26 Holes, Japan Import, Transparent (RU-SP700T) : Round Ring Binders : Office Products
Amazon.com : KTRIO 500 Pack Sheet Protectors 8.5 x 11 inch, Clear Page Protectors for 3 Ring Binder, Plastic Sleeves for Binders, Top Loading Paper Protector Letter Size : Office Products
Plastic Ring Binder A4 size 6mm-51mm sold per 10pcs BLACK Plastic Comb Binder Rings High Gloss PVC Plastic Binding Ring [Artify] | Lazada PH