Product Details: The Neapco 1310 Series 2" 4-Bolt Driveshaft Companion Flange is designed to provide a secure connection between their driveshaft and the transmission. This flange is manufactured with high-quality materials for durability and longevity and is designed for a perfect fit and easy installation. It features a seal surface designed to accommodate a seal to prevent fluid leaks. This companion flange has been tested to withstand challenging operating conditions. FleetPride is your First Click in Heavy Duty®.