US D399803 S
FIG. 1 is a front elevational view of a boat trailer hitch extension adapter showing my new design;
FIG. 2 is a back elevational view thereof;
FIG. 3 is a right side elevational view thereof, the left side elevational view being a mirror image;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof; and,
FIG. 6 is a left side view thereof mounted on a storage bracket attached to a boat trailer frame, said bracket and frame being partially shown in dotted lines.
The broken line showing of environment is for illustrative purposes only and forms no part of the claimed design.