820569-005 - HP 4GB DDR4-2400MHz PC4-19200 non-ECC Unbuffered CL17 260-Pin SoDimm 1.2V Single Rank Memory Module
Simmtronics 4GB DDR3 Laptop RAM 1600 MHz (PC 12800) with 3 Year Warranty : Amazon.in: Toys & Games
Buy Wholesale China 4gb Ddr4 Laptop Ram Memory, Original Chips, Full Compatible, Tested Well, Large Stock, From Factory & 8gb Ram Ddr4 at USD 18 | Global Sources