High quality heat treated steel. Not for use on curved shaft models. SKS5 grade or equivalent material. Uses part #173721, arbor bushing 20 mm.
Replaces Stihl #(s) 4001-713-3801, 4112-713-3801.
•ID: 1"
•OD: 9"
•Thickness: 1.8mm
•# Teeth: 4
•Usage: Grass
•Weight: 0.91 lbs