Thank you for viewing! I am selling this item due to moving and decluttering. 【Product Description】 This mouthpiece adapter allows you to play the trumpet with a French horn mouthpiece. It's for those who have wished they could play the trumpet with their usual French horn mouthpiece. Why not try a different and interesting experience? Compatible with both American and European shanks. ※ The French horn mouthpiece in the product photos is not included. ※ Some French horn mouthpieces may not be compatible depending on their shape. 【Features】 ・Allows you to play the trumpet with a French horn mouthpiece! ・Very small, so you can take it anywhere. ・Compatible with both American and European shanks. 【Size】 18mm x 37mm 【Material】 ・PLA resin (plant-based plastic) We hope you will consider it. Thank you very much!