4GB STICK For Acer Aspire Series 1420P (Tablet PC) 1425p 1430 1820PT 1820PTZ 1825PTZ 4250 4250-BZ637 4251 4252 4253 4333 4339 4349 4352 4552 4552G 4553 4560 4738 4738G 4738Z 4739 4739Z 4743 4743Z 4750 4750G 4752G 4755G 5250 5250-0450 5250-0468 5250-0639 5250-0895 5250-BZ455 5250-BZ641 5250-BZ853 5250-BZ873 5252 5253 5253-BZ480 5253-BZ656 5253-BZ659 5253-BZ66 5253-BZ684. 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)