ALFI brand AB538-W White 32" Smooth Apron Double Bowl Fireclay Farmhouse Kitchen Sink Finish/Color:White The walls taper from top

The walls taper from top to bottom so the top thickness is 15mm and the bottom is 20mm

Made of smooth resin composite material also known as solid surface with a matte white finish

Yes DIAMETER 18 3/8

you're in an ALFI brand tub

ALFI brand AB538-W White 32" Smooth Apron Double Bowl Fireclay Farmhouse Kitchen Sink Finish/Color:White The walls taper from topALFI brand fireclay farm sinks are a throwback to a simpler time. Designed to offer the traditional popular look of an apron farm sink with a contemporary twist using slightly thinner walls and sharper radius edges. This double bowl style offers a beautiful thinly fluted front apron design with a decorative top lip. Sink is completely smooth and glazed on three sides. This sink tapers from top to bottom by 1 8''. Bottom Width: 32 1 2'' Top Width 32 3