I purchased 4 of these for my Torture Rack case. They look awsome lit up. They do quiet the fan noise down noticably. Included with the shrould is a vibration sleeve. It's a great deal. The included mounting screws are to short for 120x38mm fans. Thanks DD for offering this product. A must buy for the Quiet PC WC build. This product works great, and the included LED's and vibration sleeve makes it a reasonable priced product.