Materials: Italian leather, Margot Hard clear sheet Hardware: Mini 6 binder hardware, gold, 20mm Size: M6 Color: Cobalt (cobalt blue) Specifications: Slip-in type *Refills are not included. Thank you for viewing. This is an M6 system notebook made of hard clear material and Italian leather. A Rolbahn M size fits just barely. It can also be used as a sticker notebook or an "oshi-katsu" (supporting your favorite idol/character) notebook. The leather part uses Margot leather. Margot leather is characterized by a rough texture like Japanese paper, but it will deepen in color and gain luster the more you use it. The clear part uses the same material as a hard card case. Since the leather is a natural material, there may be small scratches or color unevenness. Also, the color may look slightly different from the actual product depending on the device you are viewing. Please understand that this is a handmade item before purchasing. #SystemNotebook #ItalianLeather #ClearBinder #OshiNotebook #OshiColor #StickerNotebook #MargotLeather #Rolbahn #OshiKatsu