The 1Pc 5 Port 2 Position 1/4 inch Hand Operated Air Valve Manual Pneumatic Controller 4R21008 is a manual control valve designed to regulate compressed air in pneumatic circuits. This hand operated valve provides direct actuation with two stable positions, allowing quick changes in air flow to connected actuators without the need for electrical power. Key benefits Simple, power control: operate the valve by hand to control air flow without requiring electricity or solenoids. Fast, tactile actuation: two distinct positions enable immediate switching between flow paths for responsive machine operation. Compact 5 port, 2 position design: suitable for standard pneumatic layouts and tight spaces. Easy integration: ports sized for common 1/4 inch pneumatic tubing and fittings, simplifying system assembly and maintenance. Reliable manual control: designed for repeatable actuation in a variety of industrial environments. Key attributes Functionality: hand operated pneumatic valve, 5 ports, 2 positions. Port size: 1/4 inch. Port configuration: typical 5port arrangement used in 5/2 valves (P, A, B, and two exhaust ports EA, EB). Model: 4R21008. Material: not specified in the available information. Compatibility: intended for standard pneumatic systems using 1/4 inch tubing and fittings. Size: compact hand operated unit suitable for manual control within confined spaces. Pieces included: 1 piece (1Pc). Material and construction notes Material details are not specified in the available information. The description focuses on functionality, port count, and manual operation as central features. Applications and use cases Manual control of a double acting cylinder in a small automation station or test rig, enabling quick positioning without a power source. Operation of a pneumatic gripper or clamp in an assembly or packaging line where electrical control is not desirable or feasible. Temporary or portable pneumatic control in maintenance tasks, prototyping, or field service where a simple, reliable manual valve is needed. Operational context Twoposition actuation provides clear, distinct flow paths, enabling straightforward control logic and easy troubleshooting in pneumatic systems. This description reflects the product's brand, specifications, model, and core features without added or omitted details.