1、Premium Material: Trailer axle dust cap is made from steel alloy with a galvanized surface, ensuring high wear and erosion resistance. It's built to withstand a variety of harsh environments, ensuring longevity and durability. 2、Complete Kit: Package includes two 2.44 inch OD trailer bearings dust cap grease caps with rubber plugs. Please check the size and compatibility carefully before placing an order. 3、Fitment: Designed specifically for 2.44 inch OD 5,200‑6,000lb Boat Trailer Wheel Hubs, this dust cover is a versatile piece of equipment that is ideal for marine trailers. 4、Superior Protection: Trailer dust cap prevents dust, water, and other debris from entering the bearing interior. This offers superior protection for the bearing from pollution and wear, thus extending its service life. 5、Easy to Install: Designed for easy installation, our trailer hub lube cover requires a few simple steps. It saves you time and effort, allowing your vehicle to be upgraded quickly.