This pendant can be compatible with h track system. There are three types of track connectors: H, J, and L, please contact us if you need other track connectors, we can change it for you for free. Track lighting can be used in residential and commercial applications as a source of accent lighting to illuminate shelves and artwork, task lighting over kitchen islands, or even ambient lighting in long, narrow rooms like hallways. BULB REQUIREMENTS: 1x 40W Max E26 Bulb (Bulb not included). EASY INSTALL: Insert contacts into J series track and put it in and rotate it 90 degrees. MEASURE: 4.33" in diameter, the pendant light to be 10.2" from the top of the connector to the bottom of the light shade. Custom made is provided: please let me know if you need to custom a different length! If you need help or other special requests, please email us.