Includes 5 . The SMC 5 Check Valve is a high-pressure brass valve with a 1/4 NPT inlet connection type and threaded connector type. It has a 5 PSI cracking pressure fluid and an exterior finish of brass. Made in the United States, this valve operates as a check valve, allowing for reliable fluid control in various industrial applications. With a unit quantity of 5, this valve is durable and built to last in demanding environments.