Performance 80150 Floor Mounted Dimmer Switch maintains strict quality requirements for all raw material suppliers to ensure the highest quality finished product. Only American venders are approved. Quality is the key ingredient in every product. Rigorous QC inspection follow all products every step of the way in production to verify the integrity of every crimp, every splice, every application of terminals and connections. When you open any box, you will know without question that you have in your hands the highest quality product available anywhere.