163 1.5 Ball Mount with Fishfinder & Universal Mounting PlateThe latest edition to Scotty's ball mounting system is the 1.5" ball mount.Features:The bigger ball design gives you a much greater clamping force for larger accessories while still having a smooth full range of motionThe 163 top plate has been designed to accept large fish findersDimensions:Base Mount Dimensions: 2 1/4" x 2 1/4"Mount Height Stands: 6.5" Tall