They are made to a very high standard and are annealed, so they give an excellent seal on first tightening. Fits right across the VW, Audi, Seat, Skoda Range and many other vehicles that have an M14 Sump Plug.
The 50 Copper Sump Washers are ideal for use on vehicles such as VW, Vauxhall, Mercedes, and in particular, those equipped with the SW16/7x50 Cu engine, due to their consistent size and material composition.