Underbar Sinks are intended to provide a sink in a small space, typically under a bar or countertop. Underbar sinks are compact and they only reach a certain height so you can install them nearly anywhere. Most models are constructed from durable, corrosion-resistant stainless steel. Some models come equipped with either a single or dual drainboard for more work space. There are single, double, three- and four-compartment underbar sinks available from several different manufacturers on RestaurantSupply.com.