One individual sealed single IsoAcoustics Gaia 1 speaker isolation footer--each can support up to 55 lbs/25 kg, 165 lbs/75 kg with 3, or 220 lbs/100 kg with 4 (they are available as a single foot or a box of 4). You can purchase other individual footers as you need. These work best on hard surfaces--floor, etc. They each come with 3 different thread studs--M12-1, M8-1.25, and 1/4". You can get additional threaded studs directly from IsoAcoustics US distributor or via any Iso Acoustics dealer. I use these on my 200 lbs Talon Audio Khorus speakers on a concrete floor and they are better than the best cones while not damaging the floor too.
I am willing to ship these if necessary for actual rounded shipping cost, but always prefer a local sale--no shipping of course. Please respect both our times--no tire kickers.