High Quality: The bicycle saddle fenders are made of premium plastic material, with high strength, lightweight, and durable for long-term use. Universal Type: The mudguard rear fenders are compatible with most bikes on the market, as long as there are two steel rails under the seat bag; compatibility is not affected by seat tube thickness. Easy Installation: The mudguard protection features a quick-release design. The rear protection angle is adjustable for convenient setup. Proper Size: The bicycle mudguards measure 33 cm x 10 cm (12.99 in x 3.94 in), making them easy to assemble, disassemble, and store under the seat bag when not in use. Wide Applications: The bike mudguards effectively block mud and rain, and are suitable for various mountain bikes, road bikes, and fixed-gear bikes. (Note: Mounting screws are not included.) Size Chart: 33 cm x 10 cm / 12.99 in x 3.94 in Package Includes: 2 Bicycle Rear Mudguards (Color is optional; mixed colors are random.) Note: Slight measurement variations may occur due to manual measurement and screen display differences.