For Lenovo Thinkpad T420 T420i Memory RAM Cover Door with Screw 04W1636 0A65190
OFFTEK 2GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad T420 (DDR3-12800) Laptop Memory at Amazon.com
CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad T420 4177, 4178, 4180, 4236 Series - A13 at Amazon.com
Lenovo ThinkPad T420 i5-2540M 2.60GHz 6GB RAM 120GB SSD Ubuntu Linux – I.E.T. INDUSTRIAL ANTONIO PRIETO – SINCELEJO, SUCRE
8GB Stick for IBM Lenovo ThinkPad T Series T420 T420i T420s T520 T520i. SO-DIMM DDR3 Non-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com