Overview Product Description Details Base HT. "D" - 2 11/16 inches "A" Lengths 5 5/8 inch & 5 inch DIA -3 1/2 "A" Lengths 4 5/16 inch DIA - 3 1/4 inch "2E" - 3 7/8 inch "2F" - 1 11/16 inch Base Length - 3.937 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