We stock a variety of Unibind® thermal binding supplies, including UniCover Flex, UniCover hard covers, and UniCover spines. The UniCover Flex has clear covers attached to the spine, the UniCover hard is a hard cover book, and the UniCover spine is the spine alone, without any attached cover. These unique thermal binders are compatible with a variety of Unibind® thermal binding machines. No matter which Unibind cover you choose, they all feature the same durable steel spine with pre-applied resin adhesive. Once placed into one of the compatible machines. the resin heats up and creates a very strong bind to your pages. The adhesive can be re-heated a few times without compromising the quality, so you can edit your books if you find a typo, or need to remove or add pages. This editable feature --combined with the fact that Unibind® binding is considered by many to be the easiest, fastest, and most professional method of book binding-- makes the Unibind® thermal binding covers and spines very popular for offices of all kinds, especially those who need to make client presentations on-demand.