Genuine Jupiter, Bottom or Top valve cap, for the XO 1270 compensated euphonium.  Nickel, Bottom cap 30mm OD, Jupiter P/N 34-V406N.  Top cap P/N 34-V308N, 30mm OD.  Does not fit JEP-474.  Contact me if you wish to verify your model's fit or you need parts for another horn.  Sold as 1 each.