Timetec Hynix IC 4GB Compatible for Apple DDR3 1333MHz PC3-10600 SODIMM Memory for Early/Late 2011 13/15/17 inch MacBook Pro, Mid 2010 and Mid/ Late 2011 21.5/27 inch iMac, Mid 2011 Mac Mini (4GB) - Newegg.com
for Lenovo Essential C440 C540,B580 B305 All in One Laptop 4GB DDR3 1333 PC3 10600 RAM 8GB 2Rx8 PC3 12800 1600 Notebook Memory|RAMs| - AliExpress