Martin Yale 14254 Posting Tray Index Set, 25 Press-Board Dividers for 6" x 9" Sheets, Includes A-Z Categories and Blank Inserts, Metal Tab Index Durable index set created for use with Master posting trays. Sturdy 25 point pressboard dividers with 1/4 cut metal tabs in assorted positions. Includes A to Z and blank inserts. 25 dividers per set. For use with 6" x 9" sized forms.