Product specification:

Model: TM-912
Type: Topmount, Double Bowl, 3 Hole
Material: 304 Stainless Steel
Processed: Brushed
Thickness: 20 Gauge/1.0mm
Size: 33"x22"x9"
        3-1/2" (114mm) drain opening
        3-1/2" (114mm) to 1-1/2" (32mm) strainer
Comes with mounting template, easy to install.

Option:strainer $12/each
Option:grid $60/set