Wall Plate Adds extra support when attaching an Ergotron arm or pivot to a wall. Benefits Strengthens installation by distributing weight over a larger surface area. Sturdy aluminum construction. Part Number: 97-101-003 Description: Wall Mount Plate (aluminum) Dimensions: 3.5" x 8.38" (90 x 213 mm) Fasteners for attaching to wall not included Not compatible with HD Arms Shipping Dimensions: 7" x 9" .25" (178 x 229 x 7 mm) Shipping Weight: 1 lbs (.5 kg) Warranty: Five (5) years