ProClick Pronto Spine CassettesFor use with P3000 only. Preloaded cassettes mean fast production—eliminates loading individual spines. Provides upscale look and feel. ProClick® 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: 100; Spine Diameter: 5/8"; Number of Rings: 32.