T520, i7-2720 QM, 16GB RAM, 110 GB SSD, TYPE 4239-46U. Laptop is in good condition and everything works.  I've used it for the last few years and never had a single problem, it is built like a tank.  Only selling because I upgraded to a new Thinkpad T480s. CPU was recently upgraded (new thermal paste), new battery installed recently, fresh install of windows 10, comes with charger. Thanks for looking!