RoHS stands for Restriction of Hazardous Substances. RoHS, also known as Directive 2002/95/EC, originated in the European Union and restricts the use of specific hazardous materials found in electrical and electronic products (known as EEE). All applicable products in the EU market after July 1, 2006 must pass RoHS compliance. The substances banned under RoHS are lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (CrVI), polybrominated biphenyls (PBB), polybrominated diphenyl ethers (PBDE), and four different phthalates (DEHP, BBP, BBP, DIBP). RoHS Origin Storage 256Gb Caching SSD 3.5in PE 13G Series SATA Hot Swap SSD Kit, 256 GB, 3.5", 520 MB/s, 6 Gbit/s Origin Storage 256Gb Caching SSD 3.5in PE 13G Series SATA Hot Swap SSD Kit. SSD capacity: 256 GB, SSD form factor: 3.5", Read speed: 520 MB/s, Write speed: 400 MB/s, Data transfer rate: 6 Gbit/s, Component for: Server/workstation