An exact fitting ribbon cassette enables easy and user-friendly replacement and does not jump out during printing. Perfect harmonisation between printer mechanism and ribbon transport means uniform distribution of colour which, in turn, ensures a clean and pleasing appearance and also makes ribbon-tightening a thing of the past. It can work for LQ630 630K 635K 730K 735K 80KF SO15290 LQ615K LQ610K LQ80KFII.