Crystal Flex Clear Thermal Binding Covers

Crystal Flex Clear Thermal Binding Covers are genuine Unibind and Peleman covers with a crystal-clear front, matte back, and built-in SteelResin™ binding spine. Designed for 8-1/2" x 11" documents, they're ideal for reports, proposals, manuals, and presentations. No hole punching or separate binding parts required.

Sold by the box. Choose your spine color and capacity from the options above. Box quantities vary by spine size.

Crystal Flex Spine Sizes & Sheet Capacity

Choose a spine size based on your paper thickness and sheet count.

Capacities are approximate. Thicker paper, tabs, and inserts may require a larger spine. Your binding machine must also support the document's thickness.

Compare Unibind Binding Covers

Crystal Flex Cover Questions

Are Crystal Flex Covers the same as Unibind SteelCrystal Covers?
Yes. Crystal Flex Covers were previously sold as SteelCrystal and UniCover Flex. These older product names refer to the same line of clear-front thermal binding covers.

Will Crystal Flex Covers work with my existing Unibind machine?
Crystal Flex Covers work with compatible Unibind and Peleman machines, including older XU138, XU238, and XU338 models and newer UniBinder 60, 120, 8.1, and 8.2 models. Maximum document capacity varies by machine. Compare Unibind machines or call us at 1-800-373-9133 with compatibility questions.