A-TECH 4GB STICK For Dell Vostro 1450 1550 2420 2421 2520 3350 3360 3450 3460 3550 3560 3750 5460 V131. SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz RAM Memory. Genuine Brand. 4GB STICK SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Dell Vostro. (See Compatibility List Below)