Stainless Steel Ball Valves

I picked up some new ball valves off ebay. They're 1/2" Flowserve Series 4 all stainless steel ball valves and they are hefty. Each one weighs in at approximately 1.5 pounds and they're rated for up to 3000 PSI and 180 degrees Fahrenheit. I only paid $4.58 for both of them, pretty good deal. The 180 degree max temperature is a bit low so I won't be able to use them on my boil kettle, but they should work fine on the MT/LT, HLT, or conical fermenter.