Bounce, 4 Month Refill, Outdoor Fresh Scent Dryer Bar, For Use With Plastic Holder Already Installed With Dryer Bar Starter Kit, Works For Multiple Dryer Loads, It Automatically Releases Freshness, Softness, & Static Control For Up To 4 Months, When Bar Dissolves You Will See The Word Replace, Just Slide In A New 4 Month Bar, Use With TV #117-231.