Roof Curb Adapter, Reduces 22" Fan Curb Cap/Base to 17" Roof Curb

Curb adapters are designed to adapt standard curb cap dimensions to existing curb when replacing a fan or ventilator. Constructed of galvanized steel. This reducer is for use with model AE, sizes 12 through 14, model AS, sizes 12 through 14, model CUBE, sizes 141 through 161, model CUE, sizes 141 through 161, model G, sizes 143 through 163, and model GB, sizes 141 through 161.