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.