Lambda M18 x 1.5 weld nut of the highest quality available in stainless steel and aluminum. Stainless steel Lambda weld nut is for stainless steel exhaust systems and the Aluminum Lambda weld nut is for aluminum exhaust systems for eg. Methanol applications. Designed with a flange against the tubing for easy application when welding. Make sure to choose from Aluminum and Stainless Steel when placing order. Quantity : 1pc