Marching Euphonium (YEP) & Baritone (YBH) Valve Repair Kit. 3 guides, 3 springs, 3 valve stem felts, 3 top cap felt washers, 6 valve pad washers, one under button with felt, the other under stem felt, & 2 water key corks. Fits YEP-202M and YBH-301M (orchestral Baritone YBH-301 is a different kit) , if in doubt, email me with your model. All Yamaha OEM parts. See my item # 16196 for other Yamaha euphonium kits.