This is a genuine OEM replacement part, it is sold individually.
This spring is used in a number of String Trimmers and Brush Cutters.
This Spring is part of the String advancing system.
It is placed in between the spool and the spool housing.
Over time the spring will lose its tension and will have to be replaced.

This is an OEM replacement part, it is sold individually. The purpose of the Hanger Cap is to hang the attachments that are available. Commonly used with trimmers, blowers, brush cutters, and other outdoor equipment. Compatible with the models listed below.

This is a genuine OEM replacement part, it is sold individually.
The purpose of the filter is to keep dust and debris from contaminating the carburetor and engine.

To replace the filter you can place it in a plastic bag with a little oil and rub the oil into the filter.
Then remove the filter and squeeze it in a paper towel to remove the excess oil.

This is an OEM replacement part.
It has a right hand thread screw to remove and attach it to the trimmer head.

Its purpose is to hold the spool with the cutting line, in the spool housing.
It also acts as the bumper to advance the line from the spool.

This is a well used and abused part of the trimmer.
It may be a good idea to order an extra one.

This is an OEM replacement part,it is sold individually.
The purpose of the Air Purge Bulb is to purge all of the air from the carburetor.
It then brings fuel up through the fuel line in the tank into the carburetor.
Once the carburetor is full of fuel the Bulb will force the excess fuel back into the tank through the fuel return line.

Over time the bulb will loose it elasticity or begin to crack, it will need to be replaced at this time.

This is a genuine OEM replacement part, it is sold individually.
A spark plug is used to deliver electric current from an ignition system to an internal combustion engine.

Over time spark plugs will become dirty or fouled.
It is a good idea to replace the spark plug once this happens.
You will need to gap your spark plug according to the owners manual of the tool you have.