The Krowne 21-309L hot stem assembly is a durable, interchangeable solution designed for commercial kitchens and restaurant operations. Compatible with Royal Series faucets and pre-rinse units, this 1/4-turn ceramic cartridge ensures smooth operation with minimal effort, reducing wear and tear on your equipment. The red-marked top clearly indicates hot water, improving safety and efficiency in high-traffic kitchens. This kit is fully assembled for easy installation, saving time during maintenance and repairs. Whether you're upgrading an existing setup or replacing a worn-out part, this low-lead compliant component meets commercial kitchen standards while delivering reliable performance. With a 3-year limited warranty, it's a cost-effective choice for restaurant owners and facility managers looking for long-lasting, high-quality replacements.