Overview Product Description Base for 4-5/16 inch , 5 inch, 5-5/8 inch Diameter Motors< Base HT."D" 3 1/2 inch "A" Lengths 5-5/8 inch & 5 inch DIA. 5 1/4 inch "A" Lengths 4-5/16 inch DIA. 5 inch "2E" - 4 1/4 "2F" - 2 3/4 inch Base Length 5.667 inch Requires 2 1/2 inch diameter ring. Notes: Refer to Stock Numbers 1181A and 1182A. For mounting rings and mounting clips. Product Videos Custom Field Product Reviews