4 red albums with 23 pages and lies flat when open. 12 Ring binding system. Used to store plate blocks. Dimensions are 28cm x 21cm x 3.5cm. Comes with slipcase. 3 binders are empty. Pages take mostly larger, pre 1967 horizontal designs, though there are some smaller sized definitive pages also. There are some pen and pencil markings on the pages, so you will need whiteout tape, but these are very sturdy albums, and with a 22 ring system the pages will not come out.
