This is a genuine OEM replacement part, it is sold individually.
This is the spring that recoils the starter rope on the models shown below.
Over time the spring will wear and loose its tension and sometimes break.
We do have an article and video on

Genuine OEM replacement part, this item is sold individually.
This part is installed in between the carburetor and the air box cover
It is the Air Filter for the outdoor equipment listed below.
It has a fine mesh material for the Air Filter.
Once this filter gets dirty and or clogged it can be blown clean or brushed clean.

If it develops a hole in it or gets torn, it should be replaced ASAP, or it could cause damage to the carburetor and engine.

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.

Genuine OEM replacement part, this item is sold individually.
This is the the handle that is held on to while your are using one of the Hedge Trimmers listed below.
It is approximately 9" long x 8" wide.

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.

A carburetor basically consists of an open pipe through which the air passes into the inlet manifold of the engine.
The pipe is in the form of a Venturi: it narrows in section and then widens again, causing the airflow to increase in speed in the narrowest part.
Below the Venturi is a butterfly valve called the throttle valve — a rotating disc that can be turned end-on to the airflow, so as to hardly restrict the flow at all, or can be rotated so that it (almost) completely blocks the flow of air.
This valve controls the flow of air through the carburetor throat and thus the quantity of air/fuel mixture the system will deliver, thereby regulating engine power and speed. The throttle is connected, usually through a cable or a mechanical linkage of rods and joints.

Fuel is introduced into the air stream through small holes at the narrowest part of the Venturi and at other places where pressure will be lowered when not running on full throttle.