Description:

Bade attachment kit for Stihl brand string trimmers.
This is what you need to attach different types of blades to your string trimmer.
This kit includes the splined washer, rider plate, collar nut, tune-up / maintenance screwdriver (can also be used for a stop pin needed to hold the head to tighten and loosen), and mower air filter.
Mower air filter, support members provide frame strength, filter media pack is sealed to eliminate air bypass.
Effectively filter the PM3 reached 70%, the PM2 more than 95%.

Specification:

Bade attachment kit:
Material: Plastic + Steel
Screwdriver Size: Approx. 13 cm/ 5.12 inch
Rider plate diameter: Approx. 8 cm/ 3.15 inch
Color: As the pictures show
Mower air filter:
Material: Plastic
Color: Yellow and orange
Size: Approx. 10 ×7 ×3 cm/ 3.94 ×2.76 ×1.18 inch
Fit for model: STIHL FS120/200/250/300/350/400/450

Package Includes:

1 Piece of Thrust Washer
1 Piece of Rider Plate
1 Piece of Collar Nut
1 Piece of Screwdriver
1 Piece of Mower air filter

Note:

In order to get the normal functioning of the engine, there must be a lot of clean air inhalation. If the harmful substances in the air (dust, resin, aluminum, iron acidification, etc.) is sucked in the engine, the cylinder, piston assembly will increase the burden, which will make them wear too much, so that the engine oil is interfuse, cause more substantial wear, lead to deterioration in engine performance and shorten engine life.
Air filter, like our nose, is the first "hurdle"of the air entering the engine, its role is to filter out sand in the air as well as some suspended particles to ensure that the engine is working properly, prevent engine wear. Meanwhile air filter also has a mute function.