128MB Memory Upgrade for HP LaserJet 4050 4050N 4050TN 4050T<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>128MB 100pin sdram HP printer memory upgrade</li><li>Part#: C9121A， Q9121A， Q7709A， KTH-LJ4100/128</li><li>100% Compatible with Lifetime Warranty</li><li>Manufactured by Keystron， LLC</li><li>Keystron is a registered trademark of Keystron， LLC</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41UR6CyfSHL.jpg" noproxy>