This 4B aluminum coupling can be locked securely, ensuring a tight and reliable connection. It is designed for use in various fittings and adapters, particularly in the hydraulics, pneumatics, pumps, and plumbing industries. The brand of this coupling is unbranded, and its model number is 4B. With its high-quality construction and durable materials, this coupling can withstand heavy use and provide long-lasting performance. It is ideal for those who require a reliable and secure coupling that can handle demanding applications. Whether you are a professional plumber, mechanic, or DIY enthusiast, this 4B aluminum coupling is an excellent choice for your needs.bin 843