check straps
the left and right are the same, just rotated 180%.
the only difference is that the late model ones had a large plastic piece in the center instead of the wheel. all will work in all applications. and the later style was self sealing, and the early style had a slip on seal to keep water out.
mikemo
ho yea I have a box of both types here and the early seals here too...AND I KNOW WHERE THE BOX IS!!:dance2: