Complete your ball mounting system with this 1. 5-inch ball mount
鈥he bigger ball design gives a much greater clamping force for larger accessories while still having a smooth full range of motion
鈥he top plate has been designed specifically to accept large fish finders (7-9 inch)
鈥?.5 inch Ball Mount with Fish Finder & Universal Mounting Plate
鈥ase Mount Dimensions: 2 1/4 inch X 2 1/4 inch; Mount Height Stands: 6.5 inch Tall