Providing innovative, reliable products & services is a key element in satisfying customer needs, but there are other important elements as well. HP offers many different products & services to a broad set of customers. It is imperative that the products & services recommended to a specific customer are those that will best fulfill the customers overall, long-term needs. HP has what you need. HP offers a 500-sheet input tray for letter & A4 sizes. Only one 250-sheet tray can be installed. You must have a 250-sheet optional tray 2 installed to install an optional tray 3.