【】: The Boat Trailer Roller is made of high-quality plastic, sturdy and durable for long-term use. 【Wide Applications】: Trailer Keel Roller is a universal accessory, widely used in boats, yachts, trailers, and more, fully meeting your needs. 【Function】: The Marine Keel Roller helps load the boat onto the trailer without scratching the vehicle, improving work efficiency and offering practical performance. 【Easy to Use】: The Boat Trailer Wobble Rollers feature fine craftsmanship, are resistant to breakage, heat-resistant, easy to install, saving time and effort. 【Ideal Parts】: Marine Wobble Roller offers high reliability and stable performance, suitable for directly replacing old or damaged parts. Size Chart: 12cm x 7.5cm x 1.98cm / 4.72in x 2.95in x 0.78in Package Includes: 3 Trailer Keel Rollers Note: Please allow slight variations due to manual measurement and differences in display monitors.