DK Custom Products Outlaw Brass Breather Bolts Harley-Davidson Sportster & Evo DK-ACI-BRBB Machined From Solid Brass Bolts - Set of Two Dual Brass 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!