This Pritt Compact Correction Roller allows neat coverage of mistakes that can be written or typed over. The tape design is dry and clean and can be immediately overwritten for fast correction. The self-protected wind up mechanism and tightening screw prevents the roller from looping or becoming slack. The 4.2mm width tape is ideal for corrected printed text and the tape leaves no shadows or marks when photocopied. This pack contains 10 rollers of tape measuring 4.2mm wide and 10m long.