This is a high-quality ignition wire set by Omnispark designed for Nissan vehicles with 2.4L engines, including Altima, Xterra, and Frontier. The wire set features a female connector type and a matte finish. It is made of silicone material with an insulation outside diameter of 7 mm. The set includes interchangeable part numbers CH74171, 16-834M, and 671-4198, as well as OE/OEM part number 22440-9E002. In compliance with California Prop 65 warning, this product contains a chemical that is known to cause cancer. Please note that this item does not come with a manufacturer warranty. This ignition wire set is not a universal fitment and is solely manufactured in Mexico.