Track System - Compatible with H type 3-wire-1 circuit track system and Halo light circuit (Track not included).If you need J-type track connnctor or L-type track connnctor,please contact me by email,we can change it to you for free. Product Dimensions - 4.33" (Diameter) x 6.5" (Height), Standard total length from the top of the track connector to the bottom of the lampshade is 31.5"/80cm.Can provide customized cord length service,please contact me if you need a longer or shorter cord length. Bulb Requirement - Suitable for any E26 Socket base bulb,40W max（Bulb Not Included).Different bulb have a diffferent look,you can choose bulb type according to the environment and occasion. Easy to install - The connector at the top of the cable lock in to H-Type track lighting system with a 90 degree turn to lock it in place. Wide Application: A track lighting system is a great way to brighten any room, be it your kitchen ,coffee shop, bar or garage.A glass shade that it is never go out of style and easy to clean. 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 ( not included). EASY INSTALL: Insert contacts into H series track and put it in and rotate it 90 degrees. MEASURE : 4.33" in diam,the pendant light to be 31.5" from the top of the connector to the bottom of the light shade .Custom made is provided :pls let me know if you need to custom a different length! If you need help or other special requests, please emails us.