A , AA mink , 12 strips and 16strips per case , AA roughess is 0.07mm, 0.1mm, 0.12mm, 0.15mm, 0.18mm, 0.2mm, 0.23mm, 0.25mm, A roughess is 0.07mm, 0.1mm, 0.12mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, AA length is range from 6mm to 18mm, A lengh is the same range as AA length.the curl contain J, B, C, D.