Your beer keg is made up of the following parts:

1.  Stainless steel tank, which can be different sizes but generally the most common is a 18-19 litre 'corny' keg.

     Some are fitted with black plastic protective collar.

2.  Oval lid in the top of the tank, with a sealing O ring and lid locking arm.

3.   Pressure Relief Valve which is fitted in the oval lid.

4.  Gas in post connector with O ring. To this you fit a grey gas in ball lock disconnect

5.  Beer/liquid out post connector with O ring. To this you fit a black liquid out ball lock disconnect

6.  Gas in dip tube with O ring (short length)

7.  Liquid out dip tube with O ring  (long length)

8. Ball lock disconnects..you will require a gas in disconnect (grey)  and a beer out disconnect (black)