m303Los moldes fabricados en M303, permiten la elaboración de productos plásticos con acabados excepcionales. DECISIÓN DE TRABAJO. Acero para moldes de plásticos de alta resistenciaI completed this course in 2016 and achieved a grade 2 pass. It's a very tough course, in my opinion. You should have completed M208 (or its equivalent) recently prior to starting M303 in