REUSABLE: These deodorizer balls can provide a long lasting clean fragrance. It can be used repeatedly and will last up to 2 months. MULTI-PURPOSE:These deodorizers can also be used to freshen up your cars, school lockers, gym bags, home closets, office cabinets and linen drawers. COMPACT AND LIGHTWEIGHT: The round design makes it easy to place and carry. Each pack comes with 8 balls with a diameter of 3.9 cm. EFFECTIVELY REMOVES ODORS: These high-quality deodorizing balls will effectively eliminate unwanted odors of footwear. It is great for sneakers, golf shoes, boots, school shoes, cleats, tennis shoes and children's shoes.