The YX4 has 12m of correction tape, and the YS4 has 10m, both with a width of 4.2mm. Although they haven't been opened, they have been in a drawer for a long time. The YX4 package has discoloration and bending (see photo 5). The YS4 has a bend in the plastic part of the package (see photo 6). Thank you for your consideration (*^▽^*)