The Krowne Metal 21-403L is a set of two large adjustable supply inlets designed for versatility and compatibility. With a total adjustable range of 2 inches, these inlets feature a 1/2" NPT female inlet for easy installation. Engineered to be low lead compliant, they ensure safety and adherence to health standards. These inlets are interchangeable with most brands, making them a practical choice for various plumbing applications.