Leveler machine is the core part of cut to length line, we have 2-HI (two rows working rollers), 4-HI (two rows working rollers + two rows backup rollers), 6-HI levelers (two rows working rollers + two rows immediate rollers two rows backup rollers ) for different leveling result. Usually for small thickness, choose 4-HI and 6-HI leveler, for big thickness, choose 2-Hi and 4-HI leveler. And 6-HI leveler is mostly used for stainless steel and well as high precision and surface requirement work-pieces.