HP Q2628A 512MB 100pin DDR SDRAM DIMM for HP LaserJet 4250 4250n 4250tn 4250dtn 4250dtnsl 4345 4345x 4345xs 4345xm Printer Memory<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>512MB 100pin DDR printer memory upgrade</li><li>Part#: Q2628A， Q7720A</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/41GCvpL-rzL.jpg" noproxy>