- Feature a 150 micron, transparent PVC front cover for easy reading of the title page. - Come with a Silk White 240gsm back for extra rigidity. - Can be stored in conventional archiving folders using a GBC FileStrip (up to 8mm covers only). - Available in a wide range of sizes from 1.5mm up to 50mm so you can bind from 15 to 440 sheets. - Available in A4 and A5 sizes.