Rubber strap for securing mirror dash cams. Can be used as a universal product for a wide range of seatpost and handlebar sizes, including and not limited to bicycles, motorcycles, etc Made from a highly elastic, durable rubber material. Stretches from approximately 80mm to 125mm. Fits the size of the original rearview mirror and the width of the mirror dash cam Can be used as a spare in case the rubber band being used runs out Mirror Dash Cam Mounting Straps