Durable index set created for use with Masterï¿½ posting trays. Tabs are made of metal to last longer. Sturdy pressboard. Includes blank, A-Z and 1-100 inserts. Blank/Pre-Printed: 1-100; A-Z; Blank; File Guides Type: Top Tab Ledger Posting Guides; For Card/Sheet Size: 8 1/2 x 11; Guide Size: 8 1/2 x 11.