Pro Spur Sprocket / 3/8" Pitch, 7 TeethPack Size:1Carlton A7-PO-135-SS, GB PO531-A7X, Herr N230A7, Oregon 32790X, Poulan 952-048062, Poulan 952-048091, Poulan 530-048069, Poulan 530-048062, Ref No SPO531-37XLaser 42039, NHC 085-1097X, Oregon 57-146, Oregon 32790, Prime Line 7-05139, Quality 500-N230A7, Rotary 4307, Sandvik PO148A7, Stens 085-109, Tilton TN230A7Dayton 4Z251 AND 4Z397; Poulan 3400, 375, 3800, 395, 4000 and 3700; Sears 35885 (MANUFACTURED BY POULAN)Crank Diameter: 1/2 ", Drum ID: 3.000 ", Teeth: 7, Bearing not included