American lighting's 500-foot catenary (support) cable is perfect for adding extra support to large scale string lighting projects! American lighting's 500-foot catenary cable requires cable locks, please see American lighting's LS-CABLE-500 #ls-lock-10 (these heavy-duty cable lock fasteners support loads up to 330-pounds)! outdoor rated galvanized cable and fasteners (clips) resist corrosion. The cable is 1/8-inch (3Mm) diameter. For projects that require little to no sag, see American lighting's tightening tool LS-CABLE-500 #ls-tat (sold separately). safety note: never tighten cable with tensioning tool before the load is attached. Never overtighten cable! founded in 1989, American lighting, Manufactures a wide range of lighting solutions for your residential, commercial and specialty lighting needs. We pride ourselves in Being a lighting solutions provider by offering our customers a broad line of innovative and high quality lighting products. Continued innovation is a core strategic initiative at American lighting, and we are committed to developing new products by utilizing the latest lighting Technologies and designs. We pledge to deliver superior customer service by employing and training a team of highly experienced lighting professionals.