Track light made from hinged lid (clamp lid) square glass jar. Uncolored glass jar. Chrome color swivel arm. Swivel arm plastic adapter- clip is available in Black (as pictured) or White color. Black color adapter is for black color track & white is for white track. Line voltage. The track head is a single circuit 3-wire (H) system. Many current projects require or specify a 3-wire system. It is easier to ground, & has more accessories than the other systems. Also, it is 100% compatible with HALO, which makes substituting really easy. Approximate measurements: 7-1/2 x 6 x 4. Weight - 2 lbs (with the bulb). All electrical components are UL listed. Standard ceramic bulb socket (E26). E26 is compatible with European E27. Pictured PAR20 type Bulb is not included. Other types of bulbs can be used: Halogen; LED; CFL; Incandescent. Dimmable (with use of dimmable type bulb). Track is not included. This listing is for one unit. Shipping via USPS; UPS; FEDEX. Pictures of completed Light Fixtures in real environments (FB page): https://www.facebook.com/pages/ZAL-Creations/148255511988929 Track Light, Hinged Lid Glass Jar