Features: 1.It is also compatible with server memory bank which are wide or narrow, single or double sided, and it is also compatible with DDR, DDR2, DDR3, DDR4 desktop memory bank. 2.It can effectively protect memory components from electrostatic attacks, depending on its powerful performance. 3.When it comes to that DDR2, DDR3, DDR4 particles are accidentally dropped on the ground, it can better protect your memory bank. 4.Entitled with very nice heat dissipation, it is made of high quality pure aluminum material. 5.When those particles are broken by particles accidently falling on the ground that they are very easy to break in such a state, which could result in memory bank can no longer be used, and such unpleasant situation can be avoided by such a heat sink. specification:Item Type: Heat sink Material: Aluminum Quantity: 2PCS Applicable Models: Desktop Applicable Memory Models: DDR, DDR2, DDR3, DDR4 PackageList:2 Set x Cooling Vest4 x Thin Heat Sink2 x Thick Film NoteBefore using this product, please confirm whether the memory module is single-sided or double-sided, and then install according to different situations. Single-sided: Indicates that the memory module has eight granule chips on one side and no particles on other side. For single-sided memory bank, thick glue must be attached to increase thickness. (pictured) Double-sided: the chip is attached with thermal glue. (pictured)