This filter indicator lets you know when your air filter is ready to be changed. Do not rely on the boys at the Oil Pit to try to upsell you on one you do not need. You will be able to tell at a glance and when you get it changed, you just press the back of the indicator and it resets itself for next time. This saves you both time and money. 

I warranty this item for one full year from the date of delivery.