These paper negative storage pages are manufactured from Acid Free Translucent Paper ? Pergamyn. Each page holds 7 strips of 6 full frame negatives. 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 ?oversize? A4 and is designed for use with these pages with the extra width required.