Ideal - Sulphur Duster (140 litre)Ideal produces also pneumatic dusters, which can be used for plants protection and care with aired sulphur. Model Biostar Poly 140 Litre ONLY Biostar Poly is available in the mounted version, with either two diffusers individually closeable or one cannon shaped diffuser. It is a mechanical duster, working with a gearbox with conical helicoidal oil bath gears. Inside its tank a mechanic stirrer keeps powders mixed, allowing a continuous powder supply.