These speaker feet are machined from solid brass. They will support most speaker systems with ease. Due to the rising costs of metals, we've tried to keep the price stable and offer these as a DIY - buff them yourself kit.
Just chuck each foot up in your electric drill and spin while hitting the surface with a ScotchBrite Pad TM. Next, take a soft cloth with some metal polish and spin again to a nice high lustre. Top it off with a clear spray and the lustre will last for many years of enjoyment.
Because of the way they are bulk packed to us, you can expect a few nicks, but these should be easily hidden with the buffing procedure.