1200 sheets of AZO paper in unopened boxes. 600 are F2s, 600 F3s. Kodak stopped producing AZO years ago - it was the premier contact printing paper for large format for years, the favorite of Michael Smith and Paul Chamlee, among others. These boxes were stored in a closet which may have gotten warm over the years. That said, AZO is well known for its resilience to environmental abuse. I am GIVING these away - you pay shipping only. As is, no returns. contact dschwa8059@yahoo.com