Vibrant Performance Ball Style Inline One Way Check Valves are lightweight and constructed entirely from 6061 Aluminum alloy. Vibrant's Ball Style Inline One Way Check Valves are designed to prevent flow back of all varieties of fuel, oil or coolant. Vibrant Check Valves will stand up to the most rigorous operating environments and are capable of handling temperatures ranging from -30deg F to 400deg F and operating pressures up to 300psi. All Vibrant Performance Ball Style Inline One Way Check Valves are available in anodized black only. Cracking pressure is adjustable between 2-5 psi. Use Thread Locker when setting cracking pressure. Flow Direction: Male AN to Female ORB.