In part one we looked at the size dimensions of a table tennis table and how your table will be used, and in part two we looked at whether an indoor or outdoor table tennis table would be more suitable for you.
In part three we looked at the different types of indoor tables available - so now let's take a look at one of the most important components of a table tennis table ... the undercarriage.
Whether you're buying an indoor or outdoor table, one of the most important items to check before buying it is - what type of undercarriage does it have?
There are many different variations available, so you'll need to be clear about how your table will be used so that you can choose the right one for you.
Rollaway / wheelaway
Some tables are known as "rollaway" or "wheelaway" because they have the undercarriage, wheels and table all integrated into one neat unit.
They do take up more storage space than other tables and can be up to 6 feet (1.83m) high when closed. This extra height can cause problems if you need to negotiate steps or transport them between venues.
However, if you store them close to where they'll be used, and they're on the same level, they can often be erected and dismantled by just one person, whereas most tables require at least two people.
There are several different variations of "rollaway" design and some can be used "half-open" to give a "playback" facility - so you can practice without an opponent by hitting the ball against the upturned half of the table!
Separate halves
Other tables are in two separate halves.
The legs are attached to the underside of the table top and the wheels are cleverly incorporated into the centre edge of the table.
These types of table are easier to store and take up less space than a rollaway, but you'll need at least two people to erect and dismantle them.
These tables can have their undercarriage made of metal or wood. Personally, I prefer table tennis tables with wooden legs because I think they provide a much better foundation and better playing characteristics.
Are there any players who are wheelchair users?
If your table will be used by a table tennis player who uses a wheelchair, then the position of the table legs is very important.
Some tables have the legs positioned very close to the end of the table, whilst others are set back towards the middle of the table.
A wheelchair user will need the table legs and undercarriage set back at least 40cm (16 inches) from the end where he'll be playing.
The International Table Tennis Federation recommends that manufacturers add the letter W and "for wheelchair play" either on the frame or on the undercarriage - so look out for that.
Innovative designs
If your table will be used in high profile events, you may want to consider something more eye-catching!
A recent innovation has seen table tennis manufacturers produce undercarriages which are made especially for televised tournaments.
These have revolutionary undercarriage designs or fancy covers to hide the legs.
My favourite example of a new undercarriage design is this Double Happiness (DHS) Rainbow table ... | | 
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but there are other examples - like this Andro table ... | |  |
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... and this Donic table ... | |  |
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... and this Tibhar table with the table legs covered up ... | |  |
So ... when you've decided what type of table tennis table undercarriage is best for you, you'll need to look at one more vital component...
What type of table tennis table undercarriage is best?