The posts extend 2-3/16 inches from the wall once the unit is in place inside of the opening

Bradley 153-218 Union Conn Replacement Part

The unit measures 9-11/16 inches in height by 7-7/8 inches in width by 4 inches in depth and is mounted onto any hard surface via two keyhole slots in its back

Once installed on any hard surface

Elkay 2C18X18-2-18X Standard Scullery Sink, 2-Compartment 12" Deep Bowl(s), 18" Left & Right Drainboards, 74 (L) X 23.75 (W) X 46.75 (H) Over All Height-26" The posts extend 2-3/16 inchesStandard Scullery Sink, 2 Compartment 12" Deep Bowl(s), 18" Left & Right Drainboards, 74 (L) X 23. 75 (W) X 46. 75 (H) Over All