EIN Bicycle Blind Spot Mirror - Adjustable Round Lens for Mountain or Road Bikes Material: Plastic and Glass Size: 2.95" Basic compact rearview mirror. Three inch diameter, round, convex. Our convex mirrors capture a wider picture in a smaller space. EIN Company High quanlity and Best service .We try our best to save time for you .You do not need to compare the product.We had did it for you Before selling . You just buy and use. If you can not receive the goods within 22 Wroking Days, We will resend or refund all your money to you. Believe US, Believe Yourself. Let's enjoy the shopping !