Brand-new assembly process, high-quality materials, very strong, and pass the sealing test.Use gasoline-resistant O-rings and imported materials. New R12T Fuel Water Separator Element with Oring #18-7947.Please apply lubricating oil on the "O" ring for the first installation Filter measures 2.63 inches high.3.13 inches wide The thread size of the connecting base center is: M18x1.5.The threads for installing the fuel/water removal filter water collecting bowl is:M60x2.5 Filter Rating 10 Micron.10 micron filters are over 90% efficient at removing particles as small as 10 microns. 10-micron filters are recommended to prevent damage to sensitive inboard, sterndrive, and outboard fuel injection systems, Designed to trap the smallest particles and emulsified water from Diesel. Imported high-quality filter paper, durable and good filtering effect