From time to time you may lose a corner or a pole when moving your grow tent or putting the grow room up and down. We sell all poles and corners separately as a stand-alone products. So if you are missing a corner, just ask your local hydroponic retailer and they will be able order the part in for your grow tent.
Or alternatively email sales@green-qube.com and we should be able to help – we charge £7.50 per pole + delivery.