3/8" Black Oxide Coated Union Compression is the perfect choice for industrial and heavy-duty applications. Made with high-grade stainless steel, this union fitting features black oxide coating to provide superior protection against rust, weathering and corrosion — perfect for protecting any fitting in a range of environments. This union compressor is ideal for any high-pressure applications up to 5,000 PSI, from construction and engineering to plumbing and distribution systems. With their compression design making them an easy solution for joining pipes without the need for tools or welding, these time-saving union fittings are a must have addition to your toolkit. Features: - High grade stainless steel - Black oxide coated - Suitable for high pressure applications up to 5,000 PSI Benefits: - Easy installation — no need for welding or the use of specialised tools - Durable and strong — a reliable connection that can stand up against impact or weathering damage - Rust proof coating — provides superior protection from rust or corrosion in most urban and industrial environments