hi, here is a OS 40 "4A" airbleed carburetor, the was in a box of RC stuff I picked up, it fits older OS Ball Bearing engine's. it looks complete and looks to be in good condition. what you see is what you get, a used good older OS carb, not new no returns. thanks for looking and Happy New Year! if using paypal add the fees.
Gary Troutman cell PH# 903-802-6279