Universal sized K & N air filters for use with Rotax engines. These filters are specially designed to combine superior airflow with up to 99% filtration efficiency, resulting in increased engine performance. Pliable rubber flanges absorb vibration & may be stretched up to 1/16″ for in-between sizes. Filters may be cleaned, reoiled, & re-installed up to 25 times using K & N air filter oil & cleaner. Chrome finish cap. ‘SP’models have a rubber cap & include tabs for safety wire securement.