If you can hear and identify a music note without hearing any other notes, you have perfect pitch.

While we may not have this rare musical ability, our customers can be assured that Robert Matheson has perfect curb pitch: the ability to identify the ideal shower curb pitch between 3/16″ and 1/4″ over 6′, that if done correctly by the builder/contractor, allows water to drain properly, as shown on the illustration below: