Pioneer Post Bound Bi-Directional Memo Pocket Album BP-200... *Patented pockets hold horizontal or vertical prints up to 4x6, plus panoramics. *Archival quality paper and plastic: Acid,Lignin and PVC Free. *Optically clear pockets w/shaded background enhance the look of any size photo. *Memo area next to each pocket. *Elegant book cover design. *Micro-static slip-in pockets protect and hold photos in place. *Unlimited refillable screw post binding.