Ultimate Brass Bass Trombone Mouthpiece Tomer Maschkowski Signature Maschkowski Bass Silver Plated SP ◆ Rim Inner Diameter: 28.88mm ◆ Throat Diameter: 7.36mm ◆ Cup Depth: Deep ★ After purchasing new, it has been test-played a few times. There are a few slight spots on the surface that look like plating stains, but they were present from the time of purchase and are considered within the quality standards of this manufacturer. The "Maschkowski Bass" is the signature model of Tomer Maschkowski, bass trombone player of the Berlin German Symphony Orchestra. Compared to the large cup diameter, the relatively narrow throat diameter provides a focused and well-defined sound. The body is somewhat heavy, providing stability while also offering excellent control, and it has sufficient capacity even for modern American instruments.