Thanks, Ken, I couldn't find these-- I appreciate your help.Bob,
Here's what I found. You have three different one's to select from.
Bijur part number B5184 is the standard type
Bijur p/n B5944 is the level type
Bijur p/n B5602 is the open type.
You can look at the attached page for a clarification of each type.
http://www.fluidlinesystems.net/Bijur-Window-Units-s/1946.htm
Ken
Bob