Replace your old center caps and improve the look of your auto . truck or trailer with a set of four TYK Industries' high quality chrome plated cold forged steel (short) center caps. Easy to install . this push-through cap fits a 4.25 inch center bore and is 3.5 inches tall. The center bore is the size of the hole in the center of the wheel that the cap fits through. The center bore (also known as spigot size) is the diameter of this hole. See pictures for dimensions represented visually. PLEASE message us with any fitment questions. We are here to help you with your selection!