The 4FS-6MS Reducer&Expander from Fittings Unlimited Inc is a versatile fitting designed to adapt connections in hydraulic and pneumatic systems. This fitting features a 4mm female straight connection and a 6mm male straight connection, allowing for seamless transitions between different sizes. Made from durable materials, it meets industry standards for performance and reliability. Capable of handling pressures up to 200 PSI, it is suitable for various applications, including automotive and industrial use. The precision threading ensures a secure fit, making installation quick and easy. The 4FS-6MS is an essential component for optimizing system efficiency.