Plastic Nobsound? Says Ecstasy Prop

The description on Amazon says aluminum alloy.

There's different versions. Aluminum about $30, acrylic $22, and I've seen others. The springs all seem to be the same they just change the footers. Mostly you want the springs, because unless you component is really heavy you only need 3-4 springs and can use the extra 3-4 to make new sets. All it takes is a piece of wood and a 1/4" drill bit. Makes this the bargain tweak of the century.

I bought 3 sets of their springs and one box showed up with only 3 springs in it.  Amazing quality control.  You get what you pay for.  Almost.

I bought them from Aliexpress...Nobsound-like...

No problem...

4 sets of four boxes....

I used them one set for each speakers...With the 7 springs...

Four boxes under my speakers (20 pounds)

Four other boxes on top of the speakers with on top of them around 80 pounds of concrete

Under all speaker i use a sandwiche of different materials( quartz-granite-sorbothane-cork-bamboo) to isolate in better way each speakers from all the gear on my desk...

The load which damp each speaker is finely tuned UNDER 1% of precision (or near100gram of variation) by EARS to damp each speaker positively...

The difference in asymmetric compression between the 4 boxes under the speaker and the 4 boxes on top of the speakers, with a difference of 20 pouds in compression help decrease resonance effects...The magic is all there compared to 4 boxes only under the speaker without damping load and without a supplementary 4 boxes under the load...

It is relative isolation of vibrations with fine tuned dyssemetrical compressive force applied for resonance control...

Cost nothing...

Almost nothing, compared to anything which will be  supposedly "better" but not by a so great margin .... This compare to anything using springs....

Using the way i use it, it is optimal with this type of springs....

Better exist, but my ratio S.Q./ price is my rule.....

I appreciate all the input. I just don’t feel comfortable using plastic under my equipment to support 50+ lbs. I don’t want it to crack and result in damage to something. I’m not saying it will crack immediately, but eventually. Maybe it’s paranoia or conditioning that expects plastic to crack. Guess it’s also exposure to inferior products from China. I’m going to ask that they allow me to exchange this plastic/acrylic version for the aluminum ones that I have had success with. If not, I will give or throw these away. There’s no doubt it’s partially my mistake for not looking close enough, but the top the listing says Nobsound, so I thought I was getting the same aluminum ones. Nowhere on the box or product does it says Nobsound, I feel deceived.