OEM Sparco Plastic Binding Spine, designed for use with Fellowes, GBC, and other compatible binding machines. This binding spine will not scratch, chip, peel, or discolor, ensuring a professional appearance. It allows for easy addition and removal of pages with a machine for quick edits and holds up to 85 sheets with a 1/2" diameter. Each box contains 100 spines, providing a reliable solution for your binding needs.