This is a stainless steel guide rod for a Sig Sauer P225-A1 Black Nitride made out of 304 stainless steel. The ss guide rod is made of only the finest stainless steel material to replace the plastic factory rod. Our rods are measured to factory specification and we ensure the finest fit and finish on all of our parts. The Sig P225-A1 Black Nitride guide rod is in stock and ready to ship. Be sure to get yours today.