1970 1971 442, W-30, cutlass, F-85 -Radiator hose stamp WF . This is a stamper to correctly mark your radiator hose. This stamp was on the original hose, in white dye or paint. This is for the Upper radiator hose and for cars With 350 or 455 engines. The stamp has the part # 405904 WF and has GM in larger letters just like the originals. I have the ink pad available in another listing.These are the details that separate the first place cars from the rest. We have the highest quality parts in the market place, period. Our parts are developed by people in the United States who know these cars.