About this item [Seal] 37°sealing angle ensures positive sealing. [Size] The thread size of 8AN is 3/4-16 UNF, 10AN is 7/8-14 UNF. [Material] Made of aluminum alloy 6061-T6, anodized black surface. [Install] Easy to install, just tighten,It is recommended to use an AN adjustable wrench. [Warranty] LokoCar provide this product 6-month warranty. Any problem you might have, please feel free to contact us via eBay message.