... /B, BB/BB, BB/CC, DBB/CC, UTY Grade 5) Core: Poplar, Hardwood, Pine Birch etc Thickness: From 1.6MM to ... .2mm to +/-0.5mm According the Thickness 7) Diagonal Tolerence: No More than 3mm 8) Moisture: Less than 18%, If customer ... it below 12% 9) Quality: No Overlap for Core, No Dead Knots, No Discoloration, No Slip, No Empty Holes on Core, Both Face&Back Sanded Well Offer ...