These printers use the 39V2971 cartridge:

IBM Infoprint 1870 DNX MFP

IBM Infoprint 1870 DTX MFP

IBM Infoprint 1870 DNX

IBM Infoprint 1870 DTX

IBM Infoprint 1880 BDX MFP

IBM Infoprint 1880 FDX MFP

IBM Infoprint 1880 TBX MFP

IBM Infoprint 1880 TFX MFP

IBM Infoprint 1880 BDX

IBM Infoprint 1880 FDX

IBM Infoprint 1880 TBX

IBM Infoprint 1880 TFX