Check the listing for details. Rhino Hobby Filter 4" 100 x 300 Carbon 350m3/Hr Odour Control Hydroponics. Condition: New. Listed at 43.00 USD. 100mm x 300mm (4") Rhino Hobby Carbon Filter This range of filters provides the novice grower with a technologically sophisticated, easy to use filter system. The Rhino Hobby provides flexibility and a longer shelf life due to its unique fully reversible neck and the fact that it's filled with the highest quality carbon available.Rhino Hobby is available in a wide variety of sizes, specifically designed for hobby growers.Rhino Hobby filters are filled with the same high quality Australian mined RC412 carbon as the Rhino Pro range of filters.A 30mm carbon bed is tightly packed into the airflow cylinder which makes it a highly effective at attracting and absolving the air of pollutants.The smaller bed depth of carbon to that of the Pro filter makes it an even easier filter to handle and manage for the novice grower.As it has the most effective carbon integrated into the filter the Rhino Hobby will last significantly longer than other filters on the market aimed at the hobby grower.Features of Rhino Hobby Filters:• Fully reversible neck – prolongs lifespan • Australian mined RC412 carbon: the purest activated carbon on the market • 30mm carbon bed: Rhino quality for the hobby grower • 9-12 month lifespanChart below shows compatibility between Rhino Hobby Filter & RVK Fan.Filter SizeAir VolumeFan TypeRhino Hobby 100x300350m3/hr4" A1Rhino Hobby 125x300500m3/hr5" A1Rhino Hobby 150x300600m3/hr6" A1Rhino Hobby 150x600600m3/hr6" L1Rhino Hobby 200x400900m3/hr8" A1Rhino Hobby 200x6001125m3/hr8" L1Rhino Hobby 250x6001420m3/hr10" A1 All our products are sent out in plain, discreet PackagingPlease check out the other items I have for sale.Collection in store available in all our products.