Compatible with 4431S 4321S 4326S 4331S 4341S 4421S — 4G 1333

4G 1333 memory module compatible with models 4431S, 4321S, 4326S, 4331S, 4341S and 4421S. Designed as a direct replacement or upgrade for the listed model numbers. Verify compatibility with your device by matching the model identifiers above.