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TRAILER HUB RUBBER PLUGS: These trailer grease cap rubber plugs are made of high-quality rubber for excellent resistance to water, oil, and chemicals. They feature a smooth surface, good elasticity, and superior aging resistance for long-lasting performance.

The product is a set of 4 trailer hub caps and wheel bearing caps in black color, designed for trailers. These caps are made by Racing Auto Parts and have a zinc exterior finish. They are specifically designed for vehicle fitment and are sold in a package of 8. The item model number is JHLS0016PJ, and the manufacturer part number is JHLS0016PJ. These caps are 2.72 inches in diameter and are lightweight at 14.7 ounces, making them suitable for various trailer axle applications.