HP DeskJet 3720 blue
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HP B7RT6AE/302/304 Printhead cartridge color, 100 pages ISO/IEC 24711 for HP DeskJet 1110/2130/2620/3720/OfficeJet 5200
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HP N9K05AE/304 Printhead cartridge color, 100 pages/5% 2ml for HP DeskJet 2620/3720
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HP N9K06AE/304 Printhead cartridge black, 120 pages/5% 4ml for HP DeskJet 2620/3720
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HP N9K07AE/304XL Printhead cartridge color high-capacity, 300 pages/5% 7ml for HP DeskJet 2620/3720
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HP N9K08AE/304XL Printhead cartridge black high-capacity, 300 pages ISO/IEC 24711 6ml for HP DeskJet 2620/3720