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24" tall, nice and heavy. I've had my Adire HE12.1s on them, and they were totally stable. Here's a picture to show you the size and weight of speakers that these can handle (that's a 24"x15"x14" 3/4" MDF cabinet with about 20 lbs of concrete slabs on top):
Large spikes on bottom plate, smaller adjustable spikes on top plate. Plate dimensions are available at the PE link. The center column is fillable. The stands are so heavy though, that I just filled them with polyfill and plastic grocery bags to cut down ringing (tapping them went from a 'ting' to a 'thuck'). I can remove that stuff before sending these off if you like.
Condition - these are in pretty good shape. Some scuffs on the decorative brass end caps that can be polished out if you like, maybe a small scratch or two on the top plate that will be hidden by whatever speaker you put on them.
I'll prefer a bay area sale if possible, since these will be pretty heavy to ship (over 50 lbs). I can deliver them anywhere in the SF bay area. I'm also willing to pack and ship them if necessary.
They cost $100 new, I would like $40 for them.
Thanks,
Saurav