THEY ARE PRODUCED BY A DIFFERENT SUPPLIER THAN THE 'NON ECO' SERIES. 12 MONTH WARRANTY!Compatible HP LASERJET COLOR 4700, 4700N, 4700DN, 4700DTN, 4700PH+HP LASERJET COLOR 4730MFP, CM 4730F, 4730XM MFP, 4730XM MFP, 4730XS MFP, CM 473030 FM, CM 4730FSK, CM 4730MFP.
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