A modular printhead module is disclosed. The printhead module includes a carrier. An elongate ink delivery member is mounted in the carrier and defines a plurality of longitudinal conduits, each for carrying a respective type of ink. The elongate ink delivery member further defines a plurality of sets of apertures, each set including a plurality of apertures which are each in register with a corresponding conduit. A single printhead including a plurality of inkjet nozzles is also provided. Each inkjet nozzle engages with a respective set of apertures so that each inkjet nozzle is engaged in fluid communication with a respective conduit.