I am selling a tenor-bass trombone straight mute because I no longer need it. I used it a few times, but I've started focusing on bass trombone. I only used it for practice and a few performances, so there are no visible scratches or damage on the main body; it's in beautiful condition. The outer box has some scuffs from storage and carrying, but this doesn't affect the mute itself. Below is the product description from the sales page: ● Mute made with a new nylon-carbon material ● The new material provides excellent response, unlike metal mutes ● Soft, transparent sound when played quietly, and a sharp, rich tone when played loudly ● Industry-first cork attachment system ● Lightweight and highly durable due to the use of nylon-carbon ● Designed for ease of use 【Product Details】 ● Product Name BRASS DESIGN Trombone Straight Mute [Copper End] (For tenor trombone and tenor-bass trombone) ● Included Items ・Straight mute body ・Cork-like attachments (3 types x 3 pieces) ・Instruction manual ・Warranty ● Size: Width 140mm x Depth 140mm x Height 260mm ● Weight: 140g ● Manufacturer: BRASS DESIGN ● Country of Manufacture: Japan ★ This product is a straight mute for tenor trombones and tenor-bass trombones. It is designed for 8 1/2 inch bell sizes of standard large-bore tenor trombones. It may be difficult to attach to instruments with extremely small or large bell sizes. In such cases, returns and refunds are available, so please contact us. ※ Due to the nature of 3D printing, there may be scratches, air bubbles, or discoloration, but this does not affect the quality. Please be aware of this beforehand.