The BF-0393L is a precision 40mm propeller designed for marine applications, featuring an M4 mounting interface for secure installation on boat drive systems. This propeller delivers efficient thrust and reliable performance in water, making it ideal for RC boats, small watercraft, and marine propulsion setups. The 40mm diameter provides optimal hydrodynamic balance, ensuring smooth operation and responsive handling across varying water conditions. Built to withstand saltwater and freshwater environments, this component offers durability and consistent performance for both recreational boating and model testing applications.