64GB Kit ( 4 x 16GB Modules ) DDR4 2400 MHz ( PC4-19200 ) DDR4 SO-DIMM ( 260-Pin ) Non-ECC Unbuffered Apple Mac Certified Memory RAM Upgrade Designed For Select Apple Mac Systems: iMac (for a complete list of compatible systems, see the description section) Compatible Apple Order Numbers: MNE92LL/A / MNEA2LL/A / MNED2LL/A Compatible Apple Model IDs: iMac18,3 Compatible Apple Model Numbers/EMC: A1419 (EMC 3070) A-Tech provides a Lifetime Warranty for all orders & offers complimentary United States based Tech Support before, during, & after your purchase