Walk Behind Floor sawing: Engine:Gasoline,Diesel,Electric Blade Size:12",14",16",18", 20" 300mm,350mm,400mm,450mm,500mm Concrete Saw Cutting Machine ... blade)SC18 : with 18" blade (450mm blade)SC20: with 20" blade( 500mm blade) Concrete Saw Cutting Machine Engine Option: Gasoline engine HONDA: Honda ... 355mm/14in, 406mm/16in) Blades(406mm/16in, 457mm/18in) 400MM Gasoline Floor Saw Concrete Cutter