Pro Binder Ultra Pro's flexi "Pro binders" have been popular with duelists and collectors alike for many years. They offer space for 360 singularly filed cards in 20 double sided - side loading 9 pocket pages. The binder is of a strong but flexible design and is held closed with an intergrated soft elasticated band. The pages are constructed with an embossed middle black web material which gives a classic framed look. All materials are made from an archival-safe, acid free non-PVC material to ensure the safety of your cards.