System Features Hose Adapter for 2-1/2 Hose 5-7/32" length x 2-13/64" height x 1" depth.Dimensions shown are from the outside of the part and may vary. When measuring your louver and looking 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