16GB KIT (2 x 8GB) For HP-Compaq ProBook Series 4440s 4441s 4540s 4740s 6360b 6460b 6465b 6560b 6565b. SO-DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. 16GB KIT (2 x 8GB) 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 HP-Compaq ProBook Series. (See Compatibility List Below)