Constructed of lead free brass and solder, and copper tubes.
Includes K31230 Valve Seats and Union O-rings
Unless you order other parts in addition to this assembly, every part from your old faucet (except valve seats and union O-rings) must be removed and installed on this assembly.
This appearance of this part is the result of the 3,000+ degrees F soldering process. It isn't "bad" and it isn't "used".