A quick learner from Florida says:
February 20, 2015
I need a 3/8 inch to 3/8 inch extension for older casement windows 2,3 or 4 inches long. Do they exist?
Dave from SWISCO responded:
February 24, 2015
The only 3/8" extension we have is the 39-422, which is only available in 2". You might need to install two together if you need something longer. Could that work?