NEW 9"  BRUSH CUTTER BLADE TO FIT MOST STIHL, ECHO, HUSQVARNA, JONSERED BRUSHCUTTERS  AND MORE      Center arbor hole is 1"  ( 25mm ) in diametor OR 20 mm with included reducer bushing. 20 Chainsaw Teeth .325 pitch Sharpen with 3/16 round file.    THIS IS A DURABLE BLADE, AND THE CHAIN SAW  TEETH CAN BE SHARPENED WITH A STANDARD 3/16" ROUND SAW CHAIN FILE ( NOT INCLUDED) THIS BLADE IS FOR USE ON STRAIGHT SHAFT TRIMMERS ONLY ....NOT FOR USE ON CURVED SHAFT MACHINES !!! YOU WILL NEED THE NUT , WASHER, OR ADAPTER THAT CAME WITH YOUR BRUSH CUTTER TO FASTEN THIS BLADE SHIP USPS PRIORITY    WE SHIP FAST FROM PA.