1.5 Ball Mount with Fish Finder & Universal Mounting Plate The newest edition to our ball mounting system is our 1 ball mount. The bigger ball design gives you a much greater clamping force for larger accessories while still having a smooth full range of motion. The 163 top plate has been designed to accept large fish finders.Base Mount Dimensions: 2 x 2 Mount Height Stands: 6.5 TallWARNING: Cancer and Reproductive Harm -www.P65Warnings.ca.gov