Yamaha Mat, Step 5 - F3X-U351N-10-00. OEM-Quality Step Mat for Confident Marine Mobility. Maintain secure footing on your Yamaha watercraft with the Yamaha - Mat, Step 5 - F3X-U351N-10-00. This factory-original step mat is specifically crafted to enhance onboard safety and comfort, particularly in high-traffic zones. It offers reliable traction, even when wet, so you can move around your vessel with confidence.. Constructed from durable, marine-grade materials, this mat resists UV exposure, wear