I needed heatsinks for my 3D printer for demonstrations outdoors. It was the right price and I liked the gold color. They arrived well packaged and undamaged and were the perfect size for my stepper motors. (I had to drill a hole for the specific stepper motor shown in the photo, but they fit all my other motors with no modifications). I recommend taking a 40mm hot melt tape to fix them, very comfortable and holds up well.