This is a high quality compatible Oki 09002303 Black Ribbon  Cartridge compatible with the following:

Oki Microline 10
Oki Microline 100
Oki Microline 120
Oki Microline 172
Oki Microline 180
Oki Microline 182
Oki Microline 183
Oki Microline 184
Oki Microline 186
Oki Microline 188
Oki Microline 192
Oki Microline 193
Oki Microline 194
Oki Microline 195
Oki Microline 240
Oki Microline 280
Oki Microline 320
Oki Microline 321
Oki Microline 325
Oki Microline 351
Oki Microline 3320
Oki Microline 3321
Utax P600/1
Utax P600/2

Using a compatible Ribbon Cartridge gives you excellent printout quality without the high prices! Images used are for illustration purposes only.