Trumpet Parts: YAMAHA Pistons No deformation in the valves, no issues with the threads. The stems, felts, and valve guides are in good condition. The top cap is yellow brass. All parts are YAMAHA and the inlays are original. The springs are in good condition and can still be used for a long time. It's not a bad idea to have these on hand in preparation for when consumables need to be replaced. Thank you.