The lead-free, heavy-metal-free Madison brand cable meets several national and international environmental initiatives. These include California's Proposition 65; WEEE and RoHS European directives that will take effect in 2006; and UL, CSA, and ANSI standards. The cables employ proprietary polymer compounds for both primary and jacket insulations, allowing them to be manufactured in flexible and standard versions. The compounds don't use polybrominated diphenyls (PBDs), polybrominated diphenyl ether (PBDE), cadmium, mercury, or hexavelent chromium. Pricing ranges from under $100/1000 ft to over $4000/1000 ft, depending on cable style.