Additional product info; Collection Refill Isshu Has Arrived! Add Plain Refills To Your Collection File To Enjoy Your Collection Even More! Ten Refills Can Store Up To 180 Cards. 9 Pocket Refill Is A 3 Hole And 4 Hole Compatible Type. It Has A Flap Feature That Makes Cards Easy To Insert And Prevents Them From Falling Out Even When Turned Upside Down. It Fits Cards In The Separately Sold Pokemon Card Game Deck Sleeves, Each Pocket Holds Two Cards, And Uses A High Transparency Sheet That Makes Card Artwork Look Beautiful. Plus It Comes With One Double Sided Index Sheet That Is Convenient For Organizing!