Product code: Holophane Glass Diffuser buying Hurricane Light Cover Shade
buying This listing is for a Holophane Glass Diffuser Hurricane Light Cover Shade. Each Holophane glass cup cover measures 4 1/4 inches tall and is 6 inches across the top open rim, just under 2 1/4 inches across the rim that sits in the fixture of your choice. Each is in good shape with no chips, cracks or other issues to the glass. No markings that I can find. See pics.
I have 3 of these each available separately here.