Teka FlexLinea RS15 71.40 3-in-1 Installation Stainless Steel Sink With One Bowl typically refers to a versatile sink design that offers three different installation options: inset, undermount, and flush installation. Inset Installation involves placing the sink's rim on top of the countertop. The sink's rim or lip overlaps the countertop cutout, providing a finished and integrated look. Inset installation is relatively easier to do and is a common choice in many households.

Undermount sinks are popular for their aesthetic appeal and the ease of cleaning the countertop as there is no raised edge to catch debris. Flush-mount creates a seamless transition between the sink and the countertop. The sink and countertop are essentially at the same level, making it appear as if they are part of a single surface. This installation style offers a sleek and minimalist look but typically requires precise installation and professional expertise.