NXT Premium PRM2058S NXT PREM OKIDATA ML320 6PK UNIV BLACK RIBBONS. Compatable with these models: ML120
ML172
ML180
ML182
ML183
ML184
ML186
ML192
ML193
ML320
ML320TN
ML321
ML321TN
ML380
ML390
ML390T
ML391
ML391T
ML420
ML420N
ML421
ML421N
ML490
ML490N
ML491
ML491N
OKIMATE 240
ML172
ML180
ML182
ML183
ML184
ML186
ML192
ML193
ML320
ML320TN
ML321
ML321TN
ML380
ML390
ML390T
ML391
ML391T
ML420
ML420N
ML421
ML421N
ML490
ML490N
ML491
ML491N
OKIMATE 240