Gary: There have been many discussions on the List about Plastic Frames, etc. If I recall correctly, generally speaking the plastic hive parts do not fare too well.... seem to warp after a bit. We will see what others may have to say on the List. You can do a search of the List archives to relive prior discussions. Al Needham <MailTo:[log in to unmask]> Scituate, MA.,USA Visit " The BeeHive " Learn About Honey Bees And Beekeeping http://www.xensei.com/users/alwine