This bar adapter allows for the use of Husqvarna large mount saws to fit on bars designed for the Stihl 660/661 mount.
For reference:
Echo: 8mm bar studs
Husqvarna: 9mm bar studs
Stihl Ms660/661 and other large Stihls: 12mm bar studs
Stihl MS880/MS881: 14mm bar studs.
GB Titanium Bar Adapter GPSB9-12 (9mm to 12mm)
$20.00Price