How to choose the magic clay bar block?

How to choose the magic clay bar block?

Fine: It's better for professional car wash shop use.  light cutting
Medium: It's for DIY user also car wash shop people use.
Heavy:It's for DIY user also car wash shop people use.
King: It's good for DIY user, easy to use and need not professional wash experience.

This is magic clay bar 2.0 version. it is effictive and wasy to use in car wash proess. 
The clay on the high quality sponge, and the sponge can supply water for magic clay like lub, it is easy
to remove contaminants and clean car paint.
Use for car washing, remove contaminants.
1. Sponge
High quality sponge 
Nice hand feeling
 
 
Front is magic clay on the surface
Back is vec lro fiber black or white

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