This is a Dumas Electric Motor for use in Boats with a 6V Power Source. The recommended Boat Size is an 18-33" Hull Length. **Do not use the Dumas resistor type speed control (#2022) with this motor.** FEATURES: This is a stock 540 size motor 10,000 RPM INCLUDES: One 540 size motor Two 6-32 x ¼" hex screws (hex ball driver size = 1/16") Two brass drive dogs (diameter = 3/8", length = ½") Four 6-32 x ½" slothead screws One nylon dog bone (diameter = 3/16", length = 1¼") Two motor plates (length = 2 3/8", width = 1") REQUIRES: 6V Battery 10-28-98kzh ir/jl updt jxs 9/08/09