Buyers Products Hitch Mounted Trailer Stone Guards protect RVs and trailers by keeping road debris from kicking up. Clamp over 2″, 2-1/2″, or 3″ receivers, or mount to ball hitch shanks (mounting hardware included). Built-in cutouts for safety chain access make for easy use. Black powder-coat steel construction with durable 3/8″ thick composite mud flaps. Reversible design allows for Buyers logo to be facing inward or outward. Offered in two different heights: 15″ for standard pick-up trucks and SUVs (8597215); 20″ for taller tires and vehicles with lift kits (8597220).