3 track 2 glass 1 mesh>>   This is heavy 3 track with all 3 tracks being equal size and…

3 track 4 glass 2 mesh (centre opening)>>   This is heavy 3 track with all 3 tracks being equal…

4 track ( 3 glass 1 mesh) or 4 track 4 panel >> This is for windows and doors where…

Single openable window >> Openable windows gives maximum opening but have no mesh section. There is only one panel which…