DIGISMART COBRA FILE NO 1150 ( 31 KGS BOARD ) PO1 Spring Cobra Clip File Folder for A4, Legal, Letter Size, Office Document, Certificates, Assignment, Office, School and Colleges - Superior 540 GSM Cardboard (24)Efficiently organize and protect your documents with the DIGISMART COBRA FILE NO 1150. Made with high quality 540 GSM cardboard, this spring cobra clip file ensures durability while safely storing A4, legal, and letter size documents, certificates, and assignments for your office, school, or college needs.