Harder sponge than original Kamiyasu and better at sanding flat surfaces.  They are cut into an optimal size for grip and sanding small parts.  

 

The assort set consist of 10 mm of each of the following Grits

2 pcs of #2000 
2 pcs of #4000
2 pcs of #6000
2 pcs of #8000 
2 pcs of #10000