E-Z load 12 x 12 inch. Acid free. 10 heavy paper inserts. 10 top loading protectors. Accepts unlimited black or white refills. Archival - acid, lignin & PVC free paper & plastic. Washable, durable cover with expanding library spine. Top loading Key Hole clear polypropylene protectors. Heavy paper inserts for photo mounting or scrapbooking. Inserts easily slide out while protectors stay in album. Screw post binding system allows pages to lie flat. Takes Pioneer Key Hole protector refills RMW-5 with white paper inserts or RMB-5 with black paper inserts. Made in China.