We have now sourced a metal pedestal that we are happy to sell for those of you that require this type of ventilation. The base is louvered so no material has been removed, making the pedestal stronger. There is no need for a filter when used to cool OSR and small seeds. Seeds are less likely to block louvered slots and even air distribution is maintained. Metalcool are available with 250mm or 300mm diameter bases with top pipes to suit your fan size of either 150mm or 200mm. Whatever your material preference there is no need to look any further for crop ventilation products than Evans and Pearce.