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100% GUARANTEED + LIFETIME WARRANTY Same Day Shipping The Lexmark printer models listed below are fully compatible with this brand new 1GB PC2-5300 DDR2 200pin memory module. Please email us if you still have compatibility questions.Lexmark Series C734DN, C734DTN, C734DW, C734N, C736DN, C736DTN, C736N Lexmark Series T654N Lexmark Series X548DE, X548DTE, X560N, X651DE, X652DE, X654DE, X656DE, X658DE, X734DE, X736DE, X738DE, X738DTE Buy with Confidence We have sold over 25,000 memory upgrades worldwide and still have exceptional feedback because we consistently meet or exceed customer expectations. We ship extremely fast - never later than the next business day. It will get to you quickly and is guaranteed to work flawlessly when installed. You can count on it! Our memory modules are guaranteed to work and we offer a lifetime warranty exchange against manufacturing defects. We also accept returns in original condition within 60 days of delivery for a full refund less shipping charges. Installation assistance and technical support by email or telephone is available free of charge. Please note: We cannot always ship the exact module pictured since it may not be in our inventory at the time it's sold. You may receive Samsung, Micron, Hynix, Nanya, Kdata, Kingston or Crucial among others. All are fairly equal in performance and durability, but if you prefer a particular brand please let us know before you buy in order to confirm availability.