The covers are made of extra-beefy “Super Duty Chipboard” and have been screen-printed with thick, opaque ink, one in DDC Orange and one in Blue Sky Blue. The “flip” books are bound from the top with sturdy Double-O Wiring, to make it easy to take notes with one hand while holding the book with the other. 

Each 2-Pack includes a “Stay-Shut” Band of Rubber, sized to keep things extra-solid when your “Heavy Duty” book is packed away.

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