Breslmair 1G3S Horn Mouthpiece. 1G3S 1 → Rim is rounded and thin, 3.73mm G → Cup diameter 17.9mm 3 → Cup depth: Slightly deep S → German shank Throat diameter 4.3mm Since it is used, please understand that it is non-refundable and non-returnable. Please refrain from price negotiations. If it doesn't sell, I will lower the price. It will be packed with bubble wrap and sent in a Takkyubin Compact box.