Felt pads for trumpets. Also for cornets. Outer diameter: 15-15.5mm Inner diameter: 5mm Thickness: 2mm To offer them at a low price, they will be sent by regular mail, so there is no compensation. Please understand. We also have advantageous multiple sets, so please inquire. Thank you for your consideration. [Attention] We will refuse purchases from those who cannot rate immediately after receiving the item. We may respond with a rating in some cases. However, this does not apply if you have explained the situation in advance. Thank you.