Arch Memory 4 GB (1 x 4 GB) 240-Pin DDR3 UDIMM Interchangeable with KVR1333D3N9/4G Anti-Static Gloves included Arch Memory is a Registered Trademark of Arch Computer, LLC 1 x 4GB DDR3-1333 PC3-10600 240-Pin UDIMM 1.5v Dual Rank (2Rx8) Non-ECC Unbuffered CL9 Lifetime Replacement Warranty Included Anti-Static Gloves Included for Installation