Delux Spin-On Collars c/w Standoff Regulator 1806

Complete with 8″ body, 1/4″ square rod, locking quadrant, heavy duty handle, 1″ standoff regulator with damper. Available in diameters from 6″ to 20″ .
Blades are specially designed for optimum linear balancing. Recommended for insulated ductwork.