The Red Goat H-RSA is a high-quality sink assembly designed for 3-1/2" to 4" sink openings. This comprehensive kit includes a durable mounting head and gasket for secure installation, a reliable sink stopper to prevent unwanted drainage, and a flow control valve that regulates water flow at 3 gallons per minute. Additionally, it features a 1/2" vacuum breaker to ensure optimal performance and prevent backflow. Ideal for enhancing your disposer system, the Red Goat H-RSA combines functionality and efficiency for a seamless kitchen experience.