The nozzle diameter is 16.7mm, suitable for treble straight saxophone, please adapt it according to your own needs the main body is made of brass, carefully materials, hand-polished, nickel-plated surface is not easy to rust natural cork, waterproof and moisture-proof, sound and heat insulation, durable Washing is not easy to deform Product:Soprano Sax Straight Neck + Curved Neck Two Packs Colour:Silver Material:copper + cork Size:Straight 9.8x1.67x1.67cm, Bend 10x1.67x1.67cm Package Contents: 1 * sax straight neck 1 * curved neck Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.