GOOFIT 38mm Foam Air Filter for 4-stroke 50cc 70cc 90cc 110cc 125cc ATV and Dirt Bike Red The mouth diameter:38mm Brand New Air Filter for 4-stroke 50cc 70cc 90cc 110cc 125cc ATV & Dirt Bike Arrival within 1-2 days (Sold by GOOFIT and Fulfilled by Amazon) Arrival within 7-15 days (Ships from and sold by GOOFIT)