High performance selector ball valve manufactured in 303 stainless steel is ideal for high technology devices. This valve allows bi-directional flow between a common inlet port on the bottom of the valve, and one of two selectable ports on either side of the valve. There is also an “off” position. The valve is actuated by rotating the lever which allows the gas or liquid flow through a 0.125 inch diameter flow path. The seat for the ball is constructed of chemically resistant Teflon®. A Buna-N O-ring provides a seal on the valve stem. EPDM and Silicone are optional.