This product is either discontinued or we cannot get that from suppliers.
G.Skill F4-4000C18D-64GTES Trident Z R-elite 64g Kit, Capacity 64GB (2 x 32GB), 288-Pin DDR4 SDRAM, Speed DDR4 4000 (PC4 32000), CAS Latency 18, Timing 18-22-22-42, Voltage 1.40V, Non ECC, Unbuffered, Dual Channel Kit, Chipset Intel XMP 2.0, Silver.
The Trident Z Royal Elite series is the upper echelon of DDR4 performance and design, featuring a meticulously sculpted crystalline pattern across the polished surface of the aluminum heatspreader.