About this item: Efficient Cleaning: Solid glass water effervescent tablet is an ultra-concentrated liquid cleaner that can quickly dissolve dirt and stains and effectively clean the car glass outword. Anti-freeze and anti-fog: Suitable for winter use, it has anti-freeze function, which can prevent the wiper water from freezing in low temperature environments. It can also effectively prevent the wiper from fogging and improve driving safety. Universal for all seasons: Not only suitable for winter use, but also suitable for other seasons, it can be used all year round, convenient and practical. Easy to carry: Solid effervescent tablets are easy to carry and store, avoiding liquid spills and making them easy to use outdoors or during travel. Environmentally friendly and safe: This cleaner does not contain harmful substances, does not damage materials such as glass and rubber, and is safe to use. Package:10pcs/30pcs/50pcs