2 Stainless Steel Ball Valve

stainless steel
steel containing chromium that makes it resistant to corrosion
In metallurgy stainless steel, also known as inox steel or inox from French "inoxydable", is defined as a steel alloy with a minimum of 10.5 or 11% chromium content by mass. Stainless steel does not stain, corrode, or rust as easily as ordinary steel, but it is not stain-proof.
A form of steel containing chromium, resistant to tarnishing and rust
(Stainless steels) Steels that are corrosion and heat resistant and contain a minimum of 10% to 12% chromium. Other alloying elements are often present.

ball valve
A ball valve is a valve with a spherical disc, the part of the valve which controls the flow through it. The sphere has a hole, or port, through the middle so that when the port is in line with both ends of the valve, flow will occur.
any valve that checks flow by the seating of a ball
A one-way valve that is opened and closed by pressure on a ball that fits into a cup-shaped opening
(Ball Valves) Contains a slotted metal or plastic ball that aligns with the hot and cold water inlets when rotated by the faucet handle. Ball valves are reliable but tedious to fix. A metal valve is more durable than plastic under most circumstances.

2
two: being one more than one; "he received two messages"
two: the cardinal number that is the sum of one and one or a numeral representing this number
.2 Network (pronounced Dot-Two Network) is the name of an upcoming television network designed for digital television subchannels (hence the ".2") owned by Guardian Enterprise Group that will replace the GTN network on a date yet to be announced.