DK Custom Products Polished Aluminum Breather Bolts Harley Sportster & Evo DK-ACI-ALBB Machined & Then Polished - Set of Two Dual Screens with Filter THREE SIZES TO FIT MOST ANY Air Cleaner Set-Up 3/4" or 1 3/8" or 2" Tell us what size you want, we will send 3/4" if we don't get a message otherwise No More Hoses - Made in The USA!