Amazon.com : 144 Pieces Plastic Binder Rings Plastic Loose Leaf Rings Multi-Color Plastic Book Rings Flexible for Cards, Document Stack and Swatches Organization School Home, or Office Use, 6 Colors (27 mm) :
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Amazon.com : Plastic Binder Rings,1 Inch Flexible Loose Leaf Book Rings,Colorful DIY Keychain Rings,Ring Clips for Index Card Scrapbooks Words Card and Documents (140 Packs) : Office Products