The Coilhose 153L 1/4" industrial coupler, 1/4" ID lock-on, offers a durable connection for years of good service. This lock-on coupler has a knurled body, which enhances grip. The maximum input pressure is 300 PSI. This manual lock-on fitting has a drag guard to prevent accidental disconnection. The temperature range is -40 to 250 degrees Fahrenheit. Made in the United States.