Pro Spur Sprocket / .325" Pitch, 7 TeethPack Size:1Carlton 50425, Carlton 5-108308X, GB HU414-J7N, Husqvarna 503 89 22-02, Oregon 108308X, Ref No SHU414-27NNHC 085-1737, Rotary 10819, Stens 085-173Jonsered 2145 and 2150; McCulloch PM5000Pitch: .325", Crank Diameter: 1/2 ", Drum ID: 2.700 ", Teeth: 7, Bearing included