This is a pack of nine Lucky 7 RC 1/8 Off Road Air Filters, and are intended for use with the Kyosho TKI2. Lucky 7 air filters are precision cut two stage filters that offer excellent air filtration and protection for your engine in the harshest conditions. Conveniently packaged in a 4mil zipper bag, these filters are easily prepped and safely stored so they are ready to use when you need them. Dont roll the dice with your equipment, get Lucky.