This part is the replacement lint screen grille for your dryer. It is made of white plastic and is approximately 21 inches by 7 inches. The lint screen grille fits inside the lint screen housing and prevents clothing from falling into the lint duct. The main reason you would want to replace the lint screen grille would be if it is cracked, damaged, or missing, as clothing may be able to slip into the lint duct. This part is sold individually and is an authentic OEM part sourced directly from the manufacturer.