The ShengShou Metallic 3x3x3 M is a magnetic 3x3x3 speedcube from speedcubing brand ShengShou, it features a metallic/shiny looking coating which some people prefer the look of, the ShengShou one is slightly cheaper than the Cyclone Boys alternative but does not perform quite as well. I suspect most people are not looking for the best performing one though, they may just want a metallic 3x3x3 that at least performs ok.
Other Posts

YJ MGC Meta 3x3 review - all 3 versions
The YJ MGC Meta 3x3 is another new 3x3 from YJ, YJ have experimented with many different 3x3s...

What are the impossible cases on a 3x3 cube?
If you were to calculate the number of possible combinations on a cube mathematically then you would assume...

How to solve a triple cube
Many of you will have seen my recent videos around the Vigintuple cube - 20...