The 120 Volt cord hung pendant adaptor has a ¼ in. diameter supply wire. The 120 Volt, flexible track pendant adaptor, allows you to add any line voltage pendant encompassing a 1/4' supply wire to your 120 Volt, flexible track system. This adaptor will not work with chain or rod hung pendants. Not to be used with 12 Volt, low voltage pendants or low voltage track systems. This adaptor is UL listed.