[Quality materials] The bib clips for runners is designed by a professional factory and made of very good plastic material. The product is not easy to damage, which can ensure use for a long time. The internal magnet adopts high-strength magnetic force and has sturdy adsorption force. The diameter of each magnetic buckle is about 16-17.5mm, the diameter of the internal magnet is about 10mm, and the material is light and portable. [Practical Accessories] Race bib magnets are 12 products in total, in red, blue and green, suitable for various event clothing, and it is a practical running tool and fashion accessory. Traditional pins can easily damage clothing and pierce the skin. Using magnetic clips instead of traditional pins could protect clothing and skin, and it is also very stable. They are very practical and convenient accessories. [Easy to Use] First, take the bib clips for runners out of the package and separate them into two separate parts. Next, pick up your number cloth (runner number cloth) and choose the corner you want to fix. Put one of the magnetic clips on the front of the number cloth, close to the edge, and then put the other on the back to align them so that they fit tightly. It is simple and easy to operate, and it is a good helper for race runners. [Wide Applications] Running bib clips can be used in track and field events, as well as triathlons, cycling, climbing and other sports. Secondly, magnetic buckles can also be used in marathon competitions, school sports games and other occasions. The use of race bib magnets has a sturdy magnetic force, and it will not fall off easily even if you participate in intense sports events. The application scenarios of race bib magnets are very wide. Colour:Red & Blue & Green Material:magnet Package Contents: 12 * race bib magnets Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.