The module single facer corrugated machine is the key machine equipped for the corrugated cardboard production line. Each unit make the 2 ply corrugated cardboard and combined with face paper and other corrugated cardboard, then you can get 3 ply, 5 ply, 7 ply corrugation cardboard for carton box. The flute type have A/B/C/D/E/F/G type.