Arch Memory 4 GB (2 x 2 GB) 240-Pin DDR3 UDIMM Interchangeable with KVR1333D3N9K2/4G RAM Anti-Static Gloves Included Arch Memory is a registered trademark of Arch Computer, LLC 4GB Upgrade includes 2 x 2GB Modules Interchangeable with KVR1333D3N9K2/4G Lifetime Replacement Warranty Included Anti-Static Gloves included for protection during Installation