4GB STICK For Acer Aspire Series V5-431 V5-431-2675 V5-431-4407 V5-431-4689 V5-431P V5-471 V5-471-6569 V5-471-6687 V5-471G V5-471P V5-471P-6467 V5-471P-6498 V5-471P-6605 V5-471P-6840 V5-471P-6843 V5-471P-6852 V5-471PG V5-531 V5-531-4473 V5-531-4636 V5-531-4644 V5-531G V5-531P V5-531P-4129 V5-531P-4693 V5-551 V5-551-7850 V5-551-8401 V5-552 V5-552-8404 V5-552-8854 V5-552G V5-552G-8632. SO-DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. 4GB STICK SO-DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Acer Aspire Series. (See Compatibility List Below)