Coupler Kit, Product Type Coupler Kit, Compatible with Brand Johnson Controls, Compatible with Manufacturer Model Number M9300, Compatible with Series M9300, Overall Height 6 5/8 in, Overall Length 2 1/2 in, Overall Width 3 1/4 in, Maximum Round Shaft Diameter 3/4 in, Maximum Square Shaft Width 5/8 in, Minimum Round Shaft Diameter 3/8 in, Minimum Square Shaft Width 3/8 in