System Features Defrost Duct Hose Adapter for 2-1/2 Hose 13-1/4" length x 2-1/2" height x 2-3/4" depth.Dimensions shown are from the outside of the part and may vary. When measuring for a hose adapter also consider the thickness of the plastic which can be approximately 0.08 +/- .030 thick.The depth of the hose adapters are between 1/2" to 3/4"." Vehicle Fitment warning California Proposition 65 arrow_drop_down WARNING: California proposition 65