This FrankeUSA sink is made of composite granite, and can be mounted as either a top mount or under mount. All FrankeUSA granite sinks feature Sanitized, a built‐in protective barrier that is added during the manufacturing process. Sanitized supports normal cleaning practices by fighting bacteria, even between cleaning cycles. This sink comes standard with one hole for a faucet, with the capability for four more to be knocked out if necessary, and can be installed as a top mount or under mount sink.