Friedman plays a Bach Stradivarius tenor trombone with a Jay Friedman model LT42GT50 thin gold brass bell, improved Thayer valve and .562 50LW slide.
Visit the Selmer Bach website.

His alto trombone is a 1966 Latzsch.
Visit the Latzsch website.

Jay Friedman uses a custom mouthpiece made by Parke. It has the rim of a 3G, but a uniquely shaped cup and a smaller backbore.

Friedman has also worked with Max and Heinrich Thein to replicate an old German Kruspe trombone. He has posted details of this project and pictures of the instruments.