The Kyocera FK-3300 Fuser Kit (302TA93042) is a printer service part for the toner-fixing stage. It is intended for replacing the fuser assembly in compatible Kyocera printers.
The listed components include a pressure roller and a heating roller, which take part in fixing toner to the page. The listing names the Kyocera FS-4100DN, FS-4200DN and FS-4300DN as compatible models. This kit is intended for maintenance where the printer’s fuser needs replacement.