Dear supplier/producer,I am a buyer from Nam Do Thanh located in Vietnam. I am interested in this style of Propeller MSD Surface drive Thruster and in doing business with you.May I know more information about product such as:Blades,Model Number,Diameter ,Do you have any quality assurance certificates?Please copy and paste the questions and answers back to me.SincerelyTriNam Do Thanhny Tin Nhn l t in thoi di ng Show More