This is a "CAMBRIDGE" trumpet straight mute with a polyhedron design, made by HAWKINS MUTES. It's made of resin and is very light. Thanks to the deformable cork, the breath and sound escape well, and it sounds better than you'd expect. In my opinion, the sound is closer to brass than aluminum. This is a one-of-a-kind item imported from the UK. We apologize, but the shipping and taxes will be a little extra. Please take this opportunity to try it out.