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Metal material, strong and durable.
Sizes: 0.75 inch and 1 inch in diameter.
Package includes: 100 pieces book rings (each size for 50 pieces).
Suitable for loose-leaf, memo filing, key rings, scrapbook.
Tight lock-in design makes your books organized, not scattered after collapse.
Nubstous 100 Pieces Book Rings Loose Leaf Binder Rings 1 Inch and 0.75 Inch Silver B07XGZQ2CF