This machine is made of high grade all steel construction with robust stand and equipped with component makes it help you get rid of chaffs, straws, dust and other light impurities including husk etc in an effective manner. The seed grader features pre-aspiration and final aspiration with three easily and rapidly changeable screens - one for Scalping, one for Cleaning and one for Grading. There is Nylon Brush cleaning device for cleaning the cleaning and grading screens.