The plating of common nut products is about 10 microns in 1 to 2 coats Even genuine nuts used by automakers are coated with 2 to 3 layers of plating around 15 microns. The thickness of the plating layer greatly affects the quality and durability of the nuts. It is a very important and cost effective part of the nut. AutoAce Unmarked Genuine Nuts are plated 4-layer coat 25 microns. The plating layer is about 2.5 times thicker than other nut products! Four coats are the best of plating. Extreme quality and durability. Compared to genuine products, this product has a high quality appearance and is easy to understand and will not come back after each use. For use on genuine aluminum wheels for Honda vehicles with new vehicles and are commonly used in older vehicles before 13 years. Legend; Acord; Insight; Inspired; Ellision; Odyssey; CR-V; Step Wagon (Early Period); Stream; Civic EF/EG/EK Genuine Wheel Attachment. Basically, it is not a problem for both short HDCN192415 and long HDCN193015, but it is basically not to jump out of the aluminum wheel, but it is basically unobtrusive. We recommend a short length of 0.9 inches (24 mm) for light cars/floats. Caution: This product is not compatible with those with old wheel caps that have been pressed to prevent the cap from falling off. Spherical 12R HEX19-M12 - Pitch: 1.5 The contact points that secure the wheel is spherically shaped. It only fits Honda genuine aluminum and steel wheels that are installed on new vehicles, such as the Honda Genuine Nuts or our Genuine Honda Type Nuts. Please note: Unlike other companies, Honda wheels have a spherical surface (concave) and the nut surface of the genuine wheel, for example, if you use a tapered nut with a different shape on the original wheel, there is a danger of falling off. In addition, it is dangerous to install genuine Honda nuts on tapered wheels that are often found in foreign products. HEX (wrench size) 0.7 inches (19 mm); Total height 1.2 inches (30 mm); (B) Height from top not including spherical seat; Total width 0.9 inches (25 mm); Wheel contact shape spherical 12R; Compatible bolt standard M12 pitch 1.5 mm; (B) is a reference that you can choose a nut according to the shape of the wheel hole (seat).