Twin Air Air Filter Excluded From Discounts The 17 mm nut is

The 17 mm nut is crossed-drilled so racers can safety wire the filter to their bike

Dimensions: The stand has a platform size of 260x260mm (approximately 10" x 10) and a use height of 425mm (about 16 3/4 inches)

It's safer

Highly breathable

Twin Air Air Filter Excluded From Discounts The 17 mm nut isFEATURES Dual bonded foam design filters out even the smallest dirt particles, while allowing more airflow than two separate layer filters (flow bench proven) Twin Air filters are slightly smaller than stock to make them easier to change and to increase dead air space around the filter for better performance Flat foam sealing ring securely seats against the airbox, even in the worst riding conditions