The MPH page features two horizontal pages and is constructed of archival polypro material. This page is clear on the front with a black polypro backing. The MPH notebook page can hold two #10 envelopes for U.S. cover albums and fits the Supersafe #10 CH Cover Album, KSB Binder and Mint Sheet Binders and Files. Sold in Packs of 12 Supersafe#: MPH. Size: 10.625x11.5. Sold in Packs of 12. Case Qty: 12 .