The OEM Whirlpool Dryer Selector Knob Original Part# 21001239 is a replacement part specifically designed for Whirlpool dryers. This selector knob is essential for controlling the drying settings and cycle on your dryer. Made by the original manufacturer, this part ensures a perfect fit and reliable performance for your appliance. Upgrade or repair your dryer with this genuine Whirlpool selector knob to maintain the efficiency and functionality of your washing machine.