Here’s a Elkhart Conn 10H professional trombone. The 10H is a .500 bore instrument. It is basically a 6H with a solid copper bell. The copper bell darkens the sound so what you get is a horn with a dark bluesy sound but still has the response and high register that the 6H is famous for. This one is in very good condition. The slide has a little plating wear on the end but moves super smoothly. There is a small dent on the tuning slide that can easily be taken out. Check the pics!