Our compatible Replacement Citizen ribbons is designed and manufactured under strict ISO 9001 standards. The quality of our products will also meet or exceed OEM ribbons, allowing you substantial savings and higher yield capability over high priced OEM products. This includes six black and Red ribbons per box. Compatibilities: Dp300, Dp600, dp-612, dp-617 Citizen, dp-617 G Citizen, dp-622 Citizen, dp-624 Citizen, dp-627 Citizen, dp-630 Citizen, dp-650 Citizen, idp-3516 Citizen, idp-3520 Citizen, idp-3530 F Citizen, idp-3530 p Citizen, idp-3535 Citizen, idp-3540 F Citizen, idp-3540 p Citizen, idp-3541 F Citizen, idp-3545 Citizen, idp-3546 Citizen, idp-3550 Citizen, idp-3551 Citizen, idp-4530 Citizen, idp-4540, er-a430, er-a770, SW 2250, et 6420, ecr 1210, ecr 1220, ecr 1520, IR60 and IR61.