1、High Durability: Made of high grade steel alloy with galvanized appearance, ensuring high wear resistance and rust resistance for long lasting use in various harsh environments. 2、Complete Set: This reliable kit includes 2 pieces of 1.98in OD trailer bearings dust cap grease cap with rubber plugs for convenient replacement and installation. 3、Versatile Application: Suitable for boat trailer wheel hub OD 1.98in 2000 lb to 3500 lb Axles for reliable performance in various marine towing applications. 4、Main Function: Dust caps prevent dust, water and other debris from entering the bearing interior, protecting the bearings from pollution and wear and prolonging their service life. 5、Perfect Replacement: Ideal for refurbishing and replacing old or damaged trailer axle caps. Install without complicated tools, convenient for using, saving your time and effort.