... 300x300, 300x600, 300x1200, 400x400, 450x450, 500x500, 600x600, 600x1200, 800x800.Special size are available on request. *Lighting, HVAC equipment, air diffusers and ... , 400x400, 450x450, 500x500, 600x600, 600x1200, 800x800. If you have any special requirement, please advise us the length, width, height and the ...