These printers use the C4838A cartridge:

HP 2250

HP 2250 TN

HP Business InkJet 1000

HP Business InkJet 1100

HP Business InkJet 1100 D

HP Business InkJet 1100 DTN

HP Business InkJet 1200

HP Business InkJet 1200 D

HP Business InkJet 1200 DN

HP Business InkJet 1200 DTN

HP Business InkJet 1200 DTWN

HP Business InkJet 1700 D

HP Business InkJet 1700 PS

HP Business InkJet 2200

HP Business InkJet 2200 SE

HP Business InkJet 2200 XI

HP Business InkJet 2230

HP Business InkJet 2250

HP Business InkJet 2250 TN

HP Business InkJet 2280

HP Business InkJet 2280 TN

HP Business InkJet 2300

HP Business InkJet 2300 DTN

HP Business InkJet 2300 N

HP Business InkJet 2330

HP Business InkJet 2600

HP Business InkJet 2600 DN

HP Business InkJet 2800

HP Business InkJet 2800 DT

HP Business InkJet 2800 DTN

HP Business InkJet CP-1700

HP Color InkJet CP 1700

HP Color InkJet cp-1700 D

HP Color InkJet cp-1700 PS

HP DesignJet 10 PS

HP DesignJet 20 PS

HP DesignJet 50 PS

HP DesignJet 70

HP DesignJet 100 Plus

HP DesignJet 110

HP DesignJet 110 Plus

HP DesignJet 110 Plus NR

HP DesignJet 110 Plus R

HP DesignJet 111-24 IN

HP DesignJet 120

HP DesignJet 120 NR

HP DeskJet 2200

HP DeskJet 2200 TN

HP DeskJet 2250

HP HP 2200 CXI

HP OfficeJet 9100

HP OfficeJet 9110

HP OfficeJet 9120

HP OfficeJet 9130

HP OfficeJet Pro 9110

HP OfficeJet Pro 9120

HP OfficeJet Pro 9130

HP OfficeJet Pro K-850

HP OfficeJet Pro K-850 DN