Product specification:

Model: HA308
Type: Undermount, Double Bowl, Front-Panel
Material: 304 Stainless Steel
Processed: Brushed
Thickness: 16 Gauge/1.5mm
Size: 32⁷/₈''X20''X10'' (835X508X254mm)
        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