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ONA Air Filters give the ultimate in growers peace of mind. They are used in conjunction with ONA blocks for the neutralisation of unwanted odours in your ducting.
4 inch (100mm), 5 inch (125mm), 6 inch (150mm), 8 inch (200mm), 10 inch (250mm), 12 inch (315mm)
(verified owner) – January 25, 2021
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