Click or scroll to zoom Tap or pinch to zoom Butlerbuilt Duct Hose by Butlerbuilt $57.49 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Duct Hose has 2-1/2" diameter for use with brake, NACA, rear end or oil cooler ducts. Sold in 10' lengths.