Evoking vintage schoolhouse glass, Petersburg features a mouth-blown glossy opal diffuser. To create this elaborate shape, a skilled artisan works molten glass into a special form called a “paced mold,” which is simultaneously turned by an assistant. With careful timing, the team produces a seamless piece of beautifully detailed glasswork.SpecificationsWidth/Diameter: 12.75"Height: 13"Min - Max Height: 16" - 52"Backplate/Canopy/Base: 5.5"Shade Material: GlassNumber of Lamps: 1Wattage: 100w ea.Socket Type: E26 Medium BaseShipping Info:Please allow 4-6 business days to receive tracking. Depending on the quantity, finish and fixture selected lead times and estimated delivery schedule may vary.