Tromba Plastic Bb Tenor Trombone Blue - Practice/Travel Trombone Bundle w/Trombone Kazoo Package includes Tromba Plastic Bb Tenor Trombone Blue w/Trombone Kazoo. Bb Tenor Plastic Trombone Features High gloss appearance Contemporary brace styling Made from toughened ABS plastic. Functional features: Lock ring slide Double radius crook slide Pitched in Bb Weighs around 800g, half the weight of a brass trombone Accepts all standard mouthpieces Balanced for comfortable holding 0.500" bore 8.5 inch bell diameter.Trombone is Lightweight and is a great travel practice trombone. Made in the USA. The Trombone Kazoo is a kazoo with a bell and slide. You play it like any kazoo--by humming the tune into the mouthpiece. It is 11 inches long and made of metal with a plastic mouthpiece.