KGU Trumpet Trim Kit Medium Raw Brass Used Excellent Condition

I purchased this in a previous auction but am selling it as is because I quickly parted with my Yamaha instrument. KGU Brass YAMAHA Trumpet Trim kit Medium Raw Brass.
It can be attached to most Yamaha trumpets (YTR models), but there may be individual differences.
As this is a Raw Brass model, there may be some discoloration or dullness, so please understand this before bidding.
How about trying it if you want to test the resonance and response of a heavier instrument? It's beautiful, but please no returns or complaints.