Lambro 7" Galvanized Transition - 3.25" x 10" to 7" Round - Long Throat

This 134 7" Galvanized Transition - 3 " x 10" to Round - Long Throat.The minimum size duct allowed on most range hoods is 3-1/4″ by 10″ which is equivalent to a 6″ round. For use with rigid ductwork.