Trumpet Practice Mute This is a practice mute from Divitt. It's a mute created with a 3D printer. It's in beautiful condition, having been test-played only once. I'm selling it because I don't have a chance to use it. In my subjective opinion, the blowing feel is similar to an Okra mute. The sound is closer to a straight mute than a practice mute. It has high soundproofing capabilities.