Teflon is compatible with all kinds of oils and chemicals and temperature resistant. Together with the corrosion and fire resistant braided stainless steel covering this Goodridge oil line provides aircraft quality with an 8.5mm (0.323") inner, and 11mm (0.439") outer diameter. Its clean looks make it ideal for use on motorcycles, and Goodridge's unique swivel-style oil line connectors make installation easier and cleaner than ever before, allowing you to create a reliable and extremely good looking oil line circuit. Lines can be made in any length desired, for use with or without oil cooler and are fully reusable. Oil line connectors are chrome plated.