BT-6046 clay bar ball 
all BT-6046 magic clay bar ball can changeable of the clay pad in fine clay pad,medium clay pad, or king clay pad
the Ball of clay all made by PU, called clay ball, or clay pad applicator. 

you can see the picture show that the clay pad in differnt color, different grade for the clay ball. 

the package also have 1pc clay pad, 2pcs clay pad, and 3pcs clay pads in a blister.