Four Stroke > Husqvarna
Titanium 4T Magnetic Cylinder Filter Plug & O - ring. 161511301 / 16-15-511-01
Factory Special Part with 17mm Hex instead of the 12mm!
Husqvarna Titanium 4T Magnetic Plug. & O - ring for the Aircooled 4t from 1983 to 1986. - As pictured