Extreme Duty "E" Ball Assemblies = 3.38" Ball Mounts / Max Weight 20 lbs.

Back-Up Mounting Plate with Standard Sized "E" Length Arm & 3.68 Inch Diameter Mounting Plate

Price: $449.49

Back-Up Mounting Plate with Standard Sized "E" Length Arm and 11" x 3" Rectangular Mounting Plate

Price: $383.23

Back-Up Mounting Plate with Standard Sized "E" Length Arm and Two VESA Plates

Price: $156.95