For all you car enthusiasts and mechanics out there, this Earl's Performance Plumbing swivel union is exactly what you need for those tricky plumbing installations. This black -10 AN female swivel union (that's part number AT915110ERL if you're keeping track) is precision manufactured to ensure a perfect fit every time. Earl's has been in the game since 1955, starting by supplying military aircraft surplus components to racers, and they've maintained that same commitment to quality ever since. Whether you're working on a street machine, drag car, or off-road vehicle, this fitting delivers the reliability and performance you need. The swivel design makes installation so much easier in tight spaces where rigid fittings just won't work. The quality is professional-grade, so you know it can handle the demands of high-performance applications. Just make sure to follow the manufacturer's specifications for safe usage and proper installation. Earl's is committed to building the BEST products for street, strip, and off-road use, and this swivel union continues that tradition. If you're tired of struggling with plumbing lines that don't want to cooperate, having a few of these swivel unions in your toolbox makes the job so much smoother. They're one of those components that might seem simple but can make a huge difference in both installation ease and long-term reliability.