Size: AN4 male to M10-1.0 female inverted flare, pack of 1. Manufactured from stainless steel Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! A groove is machined into the outside of the adapter for use with a retainer clip These stainless steel fittings adapt from M10x1.0 inverted flare female to -4 AN flare male and are perfect for connecting the stainless braided hoses to the stock or upgraded brake wheel cylinder or caliper Ideal for use with brake lines, clutch lines, turbo oil feed, oil pressure, coolant, and power steering systems