This is a vintage antique green metal industrial light shade that would have been hung from a cord with a Edison type socket and bulb . They are lightly enameled not a heavy porcelain enamel .
I have several of these . I believe they are unused but they have some light oxidation on the green .
They measure : 3" deep by 8" across
No mater how many you buy the shipping will be for one but you must put them all in your cart before you buy them so I can combine the shipping . I have one extra not listed that's a little banged up . If you take them all I'll throw it in ( gently ) for free .