The 4TUBE-4BKHD W/LN STR from Fittings Unlimited Inc is a high-quality tube fitting designed for secure connections in various applications. This fitting features a robust construction that ensures durability and reliability, making it suitable for both high-pressure and low-pressure systems. The design includes a locking nut for added security, preventing accidental disconnections. With its compatibility with a range of tubes and hoses, this fitting is ideal for plumbing, hydraulic, and industrial applications. It meets industry standards for quality and performance, ensuring a dependable solution for professionals.