2-1/2 Inch ID Duct Hose, Plastic, 6 Foot Section [91-53P] When fully stretched is 6 foot and compresses to 8" See Also Our Cloth Version for Vintage Vehicles #91-53C.Excellent for use with aftermarket A/C and Heater Defrost units and replacing old, deteriorated cloth duct hose in Chevy, GM, Chrysler, Dodge, and other vehicles. Made in the USA!!!