H Series stainless steel air cylinders are built to withstand harsh environments that can hinder other cylinders. Durable construction features include a 304 stainless steel cylinder tube and a 303 stainless steel piston rod as standard. Maximum air flow, fast cylinder response and smooth rod movement are assured thanks to its full, unrestricted porting design. This disposable cylinder line is completely interchangeable to the previous Humphrey version as well as many competitive devices. These cylinders come in bore sizes ranging from ½ to 2 ½ inches with standard stroke lengths to 12 inches. Pressure is rated up to 200 psi pneumatic service.