High-quality Brass/Copper Alloy Four Way PU Assemblies designed for durability, corrosion resistance, and leak-proof performance in pneumatic and fluid systems. Precision-machined with smooth internal surfaces and strong forged construction for reliable multi-directional tube connections, efficient flow distribution, and vibration resistance. Widely used in HVAC, refrigeration, hydraulic, marine, and industrial applications, with OEM customization in sizes, threads, and branding.