Unibind SteelCrystals are the right solution if you want to create crystal-clear and durable presentation material. You can bind loose sheets in just seconds. Unibind Steelbinding products are characterized by the patented steel U-profile that enhances the binding element and thereby the bond is extremely stable and long lasting. Over 120 combinations of colors and spine widths. UniBind SteelCrystals are unique thermal binding covers with a clear acetate front and back cover. The steel spines are covered in your choice of 7 colors. SteelCrystal Covers have a thermally activated adhesive in the spine that securely holds your contents. Size: 3 mm Sheets Capacity 80gsm: 10-25 Sheets Spine Color: Aluminum Quantity: Box of 100 Covers Ref# SC-01-alum