For use with P3000 only. Preloaded cassettes mean fast production´┐Żeliminates loading individual spines. Provides upscale look and feel. ProClick´┐Ż lets pages lie flat with 360 degree rotation for convenient note taking and photocopying, and it lets you easily add and remove sheets with a special editing tool. Won't scratch, chip, peel or discolor. Sheet Capacity: 40; Spine Diameter: 5/16 in; Number of Rings: 32; Number of Pins: N/A.