Symphonic New Stonelined Trumpet Mute - New Stone Lined This is a New Stone Lined mute, a famous brand of trumpet mutes. It's a brand that almost every junior high and high school has at least one of. This mute is a straight mute, but it's a Symphonic Straight Brass Bottom mute. It has a considerable weight and gives the impression of a more metallic sound. I think it's a rather rare mute. There is a slight crack in the cork. There are other scratches, but no dents.