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The Hewlett Packard 4000/4050 & 4100 Envelope Feeder Units although similar in appearance (the 4100 unit is identifiable by the raised front corners on the top cover), are not interchangeable. The 4000/4050 unit will not slide properly into position on a HP 4100 series printer, and you may damage the connector plug if you try to force it into place. We specialize in Hewlett Packard Laserjet printers, and therefore can provide you with the correct optional extras for your printer. |
