The new plastic trombone that"s taken the UK by storm. Light, durable, with a slide that really works and a sound like you won"t believe. pBone"s great for jazz, great for students, great for marching, great for travel. pBone is a .500" bore horn and takes a standard tenor mouthpiece. Gig bag and mouthpiece are included. Endorsed by Jiggs Whigham. The NEW Jiggs Whigham p-Bone brings a fun and intriguing twist to the traditional trombone. With its plastic construction, this lightweight instrument sounds remarkably like typical brass trombones. - the manufacturer Folks, I tried one of these at the ITF in Nashville. They"re lightweight, well balanced and easy to play. They have a carbon fiber slide with brass stockings and as such are different than anything else around. They don"t need to be lubricated though it is said that Slide-O-Mix Rapid Comfort might enhance the action. The slides are a bit rough at first, but once they are properly run in, they improve markedly. The horn sounds like a trombone, with a "plastic" coloring to the sound as you might imagine. Many others who tried the horn were impressed with its sound, ease of playing and intonation. Its a 0.500 bore horn.