General description This Numatic Hetty Compatible Vacuum Cleaner 11" Microfibre Cloth Main Filter is a non-genuine replacement part designed for selected Numatic vacuum cleaners. It is specifically suitable for certain Henry and Hetty models. Technical specifications Diameter: 11" / 280mm Compatible with 160 machines only Compatibility and accessories Compatible models: Numatic HET160, HVB160, HVR160, HVR160-11 Usage Check the label under the handle of your vacuum for the model number to ensure compatibility. If your model number includes "180," "200," "240," or "370," consider purchasing the 12" filter instead.