Smart Series two compartment drop-in sink. One piece seamless stainless steel bowls. Self rimming design. Flat deck allowing more faucet options. Sound deadened bowl. 18 gauge type 304 stainless steel. Each bowl size is 20″ wide x 16″ front-to-back x 12″ deep. 3 1-1/8″ holes. Overall Size: 45-1/2″ x 21″. Cut Out: 44-3/4″ x 20-1/4″ (1-1/4″ radius corners). For countertops over 7/8″ thick, use K-28 mounting clips. Stainless steel 1-1/2 IPS basket drain.