I tried it on once for a test play, but I've decided to return all the parts to the original ones, so I'm offering it to someone who will use it. KGU Music (KGU Brass) Silver Plate It was written that it is suitable for Bach Stradivarius and Artisan. I tried it on a Bach Stradivarius 180ML. Nephrite Green Jade If you don't need the case, I will discount 300 yen for shipping. Please comment before purchasing. Trumpet piston button Bach inlay Strad 180ML Silver Plated Silver Plated Natural Stone