This is a front engine splash shield / under cover designed for the 2011-2013 Hyundai Elantra Sedan (1.
8L, 4-cyl models – GLS, GL, Limited, and L trims).
It's that plastic panel that bolts up under the front of your car to protect the engine and belts from water, dirt, and road debris.

Brand new and never used – this one's from Carpart Traders, an aftermarket brand that makes solid replacement parts.

Comes in black plastic, sold individually, with a 1-year warranty.
It's made in Taiwan and includes just the shield itself – no extra hardware, but it uses your existing bolts.

If your original shield got torn off, cracked from a low curb, or just went missing, this fills that gap.
Keep your engine bay cleaner and reduce the chance of water splashing on your alternator or belts.

There's a Prop 65 warning on this one – standard California stuff about chemicals.
Nothing unusual for automotive parts.