These couplers are designed for high pressure applications such as hydraulic rams, hydraulic jacks and pumps. This 1/4 male coupler connects to its female equivalent. Features: 1/4 Body, 1/4 NPT Female Thread. Hardened Steel. Ability to connect and disconnect under pressure. 10,000 PSI Rating. 32,000 PSI Burst Rating (Coupled). What's Included: Male Coupler.