"DuraRite" is a "synthetic" paper created for use in extreme conditions. It is actually waterproof and can even be used under water. "DuraRIte" Level notebook printed with a 4 squares to the inch grid on one side and 6 columns on the other side of each sheet. A tough polyethylene cover binds 32 sheets (64 pages). Shipping weight for single book is 12 ounces; 12 books weigh 5 lbs. (Manufacturer's number 653.) Please note the price shown is per book.