This pieces are made of white milky opaline and chromed metal fabricated in the 1970's.It is blown murano glass, it is hold by three tighten screws to the fixture. It can be installed upside down. Electrification has been checked. Dimensions:Hight: 44cm / 17,32In.Depth: 36cm / 14,17In.Diameter: 27cm / 10,63In.