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 # 79000 features a male luer lock outlet, female luer lock inlet and female luer lock control port. Made of polycarbonate and silicone, this dual check valve has a 3 psi cracking pressure, enables injection and aspiration from separate ports of a single connector and is ideal for applications that require mixing of two substances. Qosina offers a variety of flow rates, materials, cracking pressure and back pressure options. Check Valve sample kits are also available which are ideal for testing.