This steel blade is an aftermarket replacement blade,will fit any Trimmer-

(includes almost all straight shaft trimmers including stihl, husky, shindaiwa,or anyother brand models).

Smooth surface finish 
Replacement brush cutter blade
Helps cut through tough weeds and brushwood in anywhere you need
Made of  hardened steel

Specifics : 
1.Diameter:φ230MM(9")
2.bore:φ25.4MM(1") - also comes with a 20mm adapter.
3.Thickness:1.5MM
4.Teeth:36T
5.Power Type: Petrol / Gas
6.Color:Silver gray