Horn Mouthpiece MASAKI U-ST American Shank

This is a product from MASAKI, a new mouthpiece manufacturer in Japan.
I purchased this when I was unsure about which mouthpiece to choose and was trying various options.
It is a U cup with an inner diameter of 17.5mm. It has almost no signs of use.
Contrary to its linear design, it has a very honest and gentle sound.
In terms of weight, it's between a Yamaha and a Bach.
The rim has a slightly flattened apex in a round shape, making it very easy to play.