Product Description Pfizer replacement part; 961063S.A replacement base ring in the Stainless Steel finish. Base ring Stainless steel finish Pfizer replacement part. A replacement base ring. Stainless steel finish. Pfizer replacement part. From the Manufacturer Pfister replacement part; 961063S.A replacement base ring in the Stainless Steel finish. Base ring Stainless steel finish Pfister replacement part. A replacement base ring. Stainless steel finish. Pfister replacement part.