The Numatic 901607 Tritex Filter is a high-efficiency primary filter specifically designed for the compact 160 series of vacuum cleaners. Featuring a 280mm (11-inch) diameter, this genuine Numatic component is engineered to fit 6-liter drums perfectly, providing an essential barrier that protects the motor while maintaining powerful suction. The Tritex triple-layer construction ensures that fine dust and debris are trapped effectively before they can reach the motor or be recirculated into the air. Ideal for the Henry, Hetty, and Cordless HVB models, this filter is a critical replacement part for maintaining the longevity and professional cleaning standards of your Numatic vacuum fleet.