These paper negative pages are manufactured from Acid Free Translucent Paper ? Pergamyn. Each page is extra wide and will store a full roll of 120 film in any main format 6?4? / 10x15cm.5, 6?6, 6?7 or 6x9cm. The pages are side loaded and the strip positions are overprinted to help with quick loading.The binding is multi punched and is compatible with most types of ringbinder.We recommend our Photo Storage Binder reference KEN127 which is ?oversized? A4 and is designed for use with these pages with the extra width required.