I found the numbers 3084L and 3084R on the original. I also found entry guard 20755 and the numbers 6027. I am not sure which arm is the right one for my replacement, can you tell me which replacements I need? I need the left and right as it's a double window. Also, is there a certain length the arm needs to be? I saw on your site you have 9 1/2" and 10 3/4" I think...and I'm not sure what length I need so figured I'd email you for help. Thanks!
