Ball-valve assembly/Toilet Tank Fill Valve – Fills the toilet tank with water to the desired height.
Toilet Flapper – The most common part to replace on a toilet. Comes in different formats.
Pop-up and Overflow – Connects the sink to the drain.
Brass Faucet Cartridge – There are many different types and usually come in a left and right. If your replacing one take it with you to the store.