Maintain optimal airflow and engine performance with this 1 US gallon refill bottle of K&N air filter oil, designed to extend filter life and improve filtration efficiency. Weighing 3.93 kg and sized precisely at 14.50 cm by 28.70 cm by 14.20 cm, it offers ample volume for multiple filter applications. Ensure your air filter stays clean and effective with professional-grade oil trusted in filtration maintenance.