extra grade is similar to Mimmo grade 3
extra extra grade is similar to Mimmo grade 2
selected grade is similar to Mimmo grade 1 (currently not available)
all blocks are on the wet side and will need to finish curing by you
extra grade plateaux are the wettest and extra extra grade have been drying for a few month though need more drying time
since blocks need to be properly dried, we are not responsible for cracks during your drying process