Product Details: The Meritor TN/TQ Dual Dynamics Hub Cap is the perfect choice for replacing your worn-out or damaged hub caps. This genuine OEM replacement product is designed to fit 5.5" bolt circle diameters and is available in both aluminum and hi-impact poly. The aluminum caps come with a hi-impact poly window and the poly caps come with a vented plug and hub odometer-ready. Both caps include a plug and gasket or O-ring for easy installation. This durable and reliable hub cap is the perfect choice for keeping your vehicle running smoothly and looking great. FleetPride is your First Click in Heavy Duty®.