The T&S Brass B-3950-XS is a durable waste drain valve designed for efficient drainage in sinks with a 3-1/2" sink hole. It features a short twist handle for easy operation, allowing for quick opening and closing. The valve includes a 1-1/2" NPT male adapter for seamless installation and a 2" NPT male outlet for optimal waste flow. Constructed for reliability, this drain valve is ideal for both commercial and residential applications.