A menorah in the form of a thick concrete "T", with a wide top bar (tapered towards the ends) and short base. The concrete is rather uneven and bubbly. And wet, because apparently that helps the curing process. The candleholders are 1/4 inch cylindrical copper bushings, with a slightly taller connector-type one in the middle for the shammos. (It's a bit too big for Hanukkah candles, but that's the closest I could find.)
https://sb-bananachips-club.b-cdn.net/media_attachments/files/113/708/497/155/158/342/original/bcaeda03ba143a7b.jpg