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 StarTech.com FANUNIVGA, Air cooler, 1.57" (4 cm), 4600 RPM, Copper StarTech.com FANUNIVGA. Type: Air cooler, Fan diameter: 1.57" (4 cm), Rotational speed (max): 4600 RPM. Voltage: 12 V. Width: 2.43" (61.6 mm), Depth: 2.43" (61.6 mm), Height: 0.551" (14 mm). Product color: Copper