【Heavy Duty Material Trailer Hub Cap】Constructed from high-quality carbon steel and rubber, coated with zinc for added strength and resistance. These robust dust caps resist deformation, corrosion, and rust. 【Size Details】Outer Diameter: 1.98 inches (50.4 mm). Prior to ordering, carefully confirm compatibility by reviewing the size information. 【Includes 4 Seals】 With 2 caps for your daily needs and 2 seals as backup for unexpected situations. 【Compatible Fit】Designed to fit most standard 2000 - 3500 lb trailer wheel hubs, catering to both EZ Lube and standard axles. Suitable for standard brake & idler trailer axles with 1.98" diameter cap, covering most 4 lug & 5 lug axles. 【Satisfaction Guaranteed】Your satisfaction is our priority. If for any reason you're not content, feel free to reach out with any inquiries – we're dedicated to offering a genuine and satisfactory solution. Shop with confidence. 【Heavy Duty Material Trailer Hub Cap】Constructed from high-quality carbon steel and rubber, coated with zinc for added strength and resistance. These robust dust caps resist deformation, corrosion, and rust.