Top Tab Pussywillow Pressboard Folder Unit; Large Tyvek Expansion 4" Dove Grey Gusset. Reflux Blue Printing on Front Cover. Mediclip fastener base only installed in position #5 ( right side of spine) and a 2" Heat sealed fastener installed in position #3 ( Top inside left) Tab cut is 1/2 in position #1 ( Left side only); Lead Time: 6 Weeks. Compressor bars and extension pieces sold seperately.