Opened, but unused. The following is quoted from the website: [Product Description] ・Straight type muffler cutter. ・Easily change the image of the genuine muffler. ・The mirror-finished stainless steel will renew the rear view just by installing it. ・Recommended for those who couldn't replace their muffler because aftermarket ones are too loud. ・Easy installation, fixed by tightening with a hex wrench. [Product Specifications] ・Mounting port/80mm, Outlet diameter/approx. 90mm ・Overall size: Total length 180mm / Width 90mm ・Material: SUS304 stainless steel ・Color: Mirror chrome plating [Product Contents] ・Straight type muffler cutter 80Φ x 1 Please check the actual size in the image.