This sink tapers from top to bottom by approx. 3/4".3 1/2" Rear Center drain.Thickness : 3/4"Sink is completely smooth and glazed on three sides. Non Reversible.Inner Dimensions: 21 3/4" x 13 3/4" x 7"Due to the organic nature of the fireclay, material dimensions may vary by 1/8" of an inch. We recommend having the sink on location to trace and measure for countertop and cabinet cut outs. Furthermore , minor imperfections may appear. These are not defects; this is what makes each sink uniquely its own. Defective sinks will not pass our quality control inspection and would be recycled into a new sink at the factory.Can be installed via Under-Mount (countertop Over edge of sink), Top-Mount (countertop Under edge of sink), or Flush-Mount (countertop Even with sink)This sink is constructed of solid high-grade fireclay�material�using high pressure casting, ensuring durability, longevity, and resilience�to�acids, alkali''s, scratches, and chipping.Certified by Uniform Plumbing Code (cUPC)Heat resistant up to 350'' F. This sink has been tested and will not crack due to heat exposure from a pot / pan up to 350'' F hot.