The pBone mini is a fully functioning dual bore Eb alto trombone constructed in ABS and glass fibre. With all the benefits of the Jiggs pBone but smaller and lighter. Durable Like the Jiggs pBone pBone mini can take knocks bumps and scrapes in its stride. It is strong enough to allow beginners to explore the trombone without the need for lengthy do s and don ts . Accessible At less than half the weight of a brass alto trombone the pBone mini is ideal for those who find it difficult to deal with the weight and balance of a metal trombone. The pBone mini opens the door for many more people to start their journey into the incredible world of music. Slide Just as with the original pBone the composite slide tubes lap in over time; this means the slide gets better and better with use.