Product Features:
- Battery emissions filter
- Durable acid-proof housing protects against acid overflow
- Ergonomic design for easy installation
- Ergonomic easy-off twist cap
- Instant electrolyte level detection with the “magic eye”
- Prevents corrosion of the battery case
- Reduce the need for cell watering
- Reduces harmful gas emissions
- Returns 80% of evaporated water back to the battery