The product is a welding fillet gauge specifically designed for stainless steel. This gauge, often referred to as a weld gauge, is used for measuring the quality and size of the fillet weld on stainless steel materials. It is a precision tool that helps ensure the accuracy and consistency of the weld. With a unit quantity of 1, this gauge is a must-have for professionals in the metalworking industry who require precise measurements for welding projects involving stainless steel.