Qosina offers an extensive line of Check Valves, available in a variety of styles that are in stock and ready for immediate delivery. Qosina part # 80091 features a yellow, 0.105 inch ID inlet and clear, 0.105 inch ID outlet. This in-line valve has a low, 0.433 psi cracking pressure which determines when the component starts to open. Made of polycarbonate and silicone, this duckbill valve style is ideal for applications where back pressure is a concern. Qosina offers a variety of flow rates, materials, cracking pressure and back pressure options. Check Valve sample kits are also available which are perfect for testing.